Helpppppp me with number 5 pleaseeeeeeeeee

The mean difference between the call times and the company’s average call time is 0.4.

It should be noted that mean also means average.

Based on the information given, the mean of the numbers will be:

= -2.32 + -1.55 + 4.79 + 0.68 / 4

= 1.6/4

= 0.4

Therefore, the mean difference between the call times and the company’s average call time is 0.4.

Learn more about mean on:

brainly.com/question/1136789

#SPJ1

The sampling used in this situation is Stratified sampling
In the question, students are selected from subgroups of Sophomore, Junior, and Senior classes.

We are told that 49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively.

This means that the sample numbers of 49, 34 and 48 students were selected in proportion to the subgroup sizes of 496, 348, and 481 students respectively.

Thus, due to the fact that subgroups were selected & that sample number of students were also selected in proportion to their respective subgroup sizes.

This is, therefore, a stratified sampling.

To learn more about sampling, visit:

brainly.com/question/13287171

#SPJ4

Q: 49, 34, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively. Identify which type of sampling is used and why?

Their exam must have been scheduled on Wednesday, allowing them to start hiking on Thursday after the exams.

To determine the day of the week on which Kai and Finley's exam was scheduled, we need to consider the information provided about the trail being closed on Mondays, Wednesdays, and weekends.

If they had planned to hike to the log cabin for two days after the exams, and the trail is closed on weekends, it means they cannot start hiking on Saturday or Sunday.

Since they cannot start hiking on Saturday or Sunday, the two possible options for the exam day would be Monday or Wednesday, as they have not specified whether the hike starts immediately after the exams or the day after.

However, we can conclude that their exam was not scheduled on Monday, as the trail is closed on Mondays, and they had planned to hike immediately after the exams.

Therefore, their exam must have been scheduled on Wednesday, allowing them to start hiking on Thursday after the exams.

Learn more about word problems at https://brainly.com/question/21405634

#SPJ1

Answer:

I think its 50centimeters

Hope this helps

The difference in overall gain between selling stock A at the current day's high price or low price and selling stock B at the current day's high price or low price is $239.50.

To determine the difference in overall gain or loss between selling stock A at the current day's high price or low price and selling stock B at the current day's high price or low price, we need to calculate the selling prices of the stocks.

Stock A:

High price = $105.19

Low price = $103.25

Close price = $103.38

Stock B:

High price = $145.18

Low price = $143.28

Close price = $144.05

The investor purchased 50 shares of stock A at $90 per share and 75 shares of stock B at $145 per share.

To calculate the selling prices, we need to multiply the number of shares by the respective selling price.

Selling price of stock A at the high price: 50 shares \(\times\) $105.19 = $5,259.50

Selling price of stock A at the low price: 50 shares \(\times\) $103.25 = $5,162.50

Selling price of stock B at the high price: 75 shares \(\times\) $145.18 = $10,888.50

Selling price of stock B at the low price: 75 shares \(\times\) $143.28 = $10,746.00

Now, let's calculate the difference in overall gain or loss:

Difference in overall gain = Selling price at the high price - Selling price at the low price

= ($5,259.50 + $10,888.50) - ($5,162.50 + $10,746.00)

= $16,148.00 - $15,908.50

= $239.50

For similar question on selling stock.

https://brainly.com/question/13454463  

#SPJ8

Answer:

The p-value of the test is 0.4414, higher than the standard significance level of 0.05, which means that there is not a a significant difference in the proportion of apartment dwellers and home owners who own artificial Christmas trees.

Step-by-step explanation:

Before testing the hypothesis, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \(\mu\) and standard deviation \(\sigma\), the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \(\mu\) and standard deviation \(s = \frac{\sigma}{\sqrt{n}}\).

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \(\mu = p\) and standard deviation \(s = \sqrt{\frac{p(1-p)}{n}}\)

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

Apartment:

38 out of 78, so:

\(p_A = \frac{38}{78} = 0.4872\)

\(s_A = \sqrt{\frac{0.4872*0.5128}{78}} = 0.0566\)

Home:

46 out of 84, so:

\(p_H = \frac{46}{84} = 0.5476\)

\(s_H = \sqrt{\frac{0.5476*0.4524}{84}} = 0.0543\)

Test if the there a significant difference in the proportion of apartment dwellers and home owners who own artificial Christmas trees:

At the null hypothesis, we test if there is no difference, that is, the subtraction of the proportions is equal to 0, so:

\(H_0: p_A - p_H = 0\)

At the alternative hypothesis, we test if there is a difference, that is, the subtraction of the proportions is different of 0, so:

\(H_1: p_A - p_H \neq 0\)

The test statistic is:

\(z = \frac{X - \mu}{s}\)

In which X is the sample mean, \(\mu\) is the value tested at the null hypothesis, and s is the standard error.

0 is tested at the null hypothesis:

This means that \(\mu = 0\)

From the samples:

\(X = p_A - p_H = 0.4872 - 0.5476 = -0.0604\)

\(s = \sqrt{s_A^2 + s_H^2} = \sqrt{0.0566^2 + 0.0543^2} = 0.0784\)

Value of the test statistic:

\(z = \frac{X - \mu}{s}\)

\(z = \frac{-0.0604 - 0}{0.0784}\)

\(z = -0.77\)

P-value of the test and decision:

The p-value of the test is the probability of the difference being of at least 0.0604, to either side, plus or minus, which is P(|z| > 0.77), given by 2 multiplied by the p-value of z = -0.77.

Looking at the z-table, z = -0.77 has a p-value of 0.2207.

2*0.2207 = 0.4414

The p-value of the test is 0.4414, higher than the standard significance level of 0.05, which means that there is not a a significant difference in the proportion of apartment dwellers and home owners who own artificial Christmas trees.

Answer:

supplementary

linear

Step-by-step explanation:

Area: 11.18 sq units

Perimeter: 26.18 units

To find the area and perimeter of the triangle with vertices A(-6, -1), B(-3, 3), and C(5, -3), follow these steps:

1. Find the lengths of the sides:

  - Side AB: Calculate the distance between points A and B using the distance formula: AB = √[(x₂ - x₁)² + (y₂ - y₁)²]

    Substitute the coordinates: AB = √[(-3 - (-6))² + (3 - (-1))²] = √[3² + 4²] = √(9 + 16) = √25 = 5 units

  - Side BC: Calculate the distance between points B and C using the distance formula: BC = √[(x₂ - x₁)² + (y₂ - y₁)²]

    Substitute the coordinates: BC = √[(5 - (-3))² + (-3 - 3)²] = √[8² + (-6)²] = √(64 + 36) = √100 = 10 units

  - Side CA: Calculate the distance between points C and A using the distance formula: CA = √[(x₂ - x₁)² + (y₂ - y₁)²]

    Substitute the coordinates: CA = √[(-6 - 5)² + (-1 - (-3))²] = √[(-11)² + 2²] = √(121 + 4) = √125 = 11.18 units

2. Calculate the perimeter:

  Perimeter = AB + BC + CA = 5 + 10 + 11.18 = 26.18 units

3. Find the area using the Shoelace Formula:

  Area = 0.5 * |(x₁y₂ + x₂y₃ + x₃y₁) - (x₂y₁ + x₃y₂ + x₁y₃)|

  Substitute the coordinates: Area = 0.5 * |(-6 * 3 + (-3) * (-3) + 5 * (-1)) - (-3 * (-1) + 5 * 3 + (-6) * (-3))|

  Simplify: Area = 0.5 * |(-18 + 9 - 5) - (3 + 15 + 18)|

           = 0.5 * |-14 - 36|

           = 0.5 * |-50|

           = 0.5 * 50

           = 25 sq units

Therefore, the area of the triangle is 25 square units and the perimeter is 26.18 units.

For more such questions on Perimeter, click on:

https://brainly.com/question/397857

#SPJ8

Answer:

2 times faster than Sasha

Step-by-step explanation:

Because it is 15 miles and it doesn't matter how fast Sasha walks its just that times 2.5 which in this case gets us 2 times faster assuming that Sasha is walking 5 miles an hour.

Robert's speed if they meet after 2.5 hours is 4.8 mph as calculated below.

Since the perimeter of the marsh is 15 miles, and Robert and Sasha meet after 2.5 hours, they each walked 15 / 2.5 = 6 miles in that time.

Since Robert walks twice as fast as Sasha, Sasha walked 6 miles while Robert walked 2 * 6 = 12 miles.

Therefore, Robert's speed is 12 miles / 2.5 hours = 4.8 mph.

Read more about speed here:

https://brainly.com/question/13943409

#SPJ3

The angle of the T in the ΔRST is 100° and the value of p is 11.

Define Triangle.

A triangle is a polygon that consists of three sides and three vertices. The fact that the interior angles of a triangle add up to 180 degrees is the most crucial aspect of triangles. This characteristic is known as the angle sum property of a triangle.

i.e., In a give ΔABC, ∠A + ∠B + ∠C = 180°.

Given:

∠R = 37°; ∠S = 43°; ∠T = 10p-10°

Let's take ∠T = x

In ΔRST,

∠R + ∠S + ∠T = 180°

37 + 43 + x =  180°

x = 180 - 80 ⇒ 100

∴ ∠T = 100°

To find the value of p,

 ∠T = 100

10p - 10 = 100

10p = 110 ⇒ 11

∴ p = 11

To know more about angles visit:

brainly.com/question/7116550

#SPJ1

Answer:

Is this the complete problem?

Step-by-step explanation:

If we compare both sides of the equation we get,

D. a = 4, b = 6 and c = 5

Answer: y= -2/5x + 2

Step-by-step explanation:

Y= Mx + b

M is the slope

B is the y intercept

The y intercept will be out on the y axis

The slope will be rise over run ( do you first then do to the right!)

Answer:

\(\frac{1}{2-tan(y)} = \frac{3\sqrt{3}}{6\sqrt{3}-1}\)

After Rationalising:

\(\frac{1}{2-tan(y)} = \frac{54 +3\sqrt{3}}{107}\)

Step-by-step explanation:

tan(x) = 3√3

x + y = 90 (complimentary angles)

⇒ x = 90 - y

tan(\(\frac{\pi}{2}\) - θ) = cot(θ)

⇒ tan(90 - θ) = cot(θ)

⇒ tan(90 - y) = cot(y)

⇒ tan(x) = cot(y)

⇒ cot(y) = 3√3

⇒ \(\frac{1}{tan(y)}\) = 3√3

⇒ tan(y) = \(\frac{1}{3\sqrt{3}}\)

\(2-tan(y) = 2 - \frac{1}{3\sqrt{3}} \\\\= \frac{2*3\sqrt{3} -1}{3\sqrt{3} } \\\\= \frac{6\sqrt{3} -1}{3\sqrt{3} }\\\\\\\implies \frac{1}{2-tan(y)} \\\\= \frac{3\sqrt{3}}{6\sqrt{3}-1}\)

Multiply and divide by : 6(√3) + 1

\(\frac{3\sqrt{3}}{6\sqrt{3}-1}\frac{6\sqrt{3}+1}{6\sqrt{3}+1}\\ \\= \frac{(3*6*\sqrt{3}*\sqrt{3}) + 3\sqrt{3}}{6^2 * (\sqrt{3})^2 -1^2}\\\\= \frac{18*3 +3\sqrt{3}}{36*3 -1}\\\\= \frac{54 +3\sqrt{3}}{108-1}\\\\= \frac{54 +3\sqrt{3}}{107}\)

The reading that separates the rejected thermometers from the others is given as follows:

1.175 ºC.

The z-score of a measure X of a normally distributed variable that has mean represented by \(\mu\) and standard deviation represented by \(\sigma\) is obtained by the equation presented as follows:

\(Z = \frac{X - \mu}{\sigma}\)

The mean and the standard deviation for this problem are given as follows:

\(\mu = 0, \sigma = 1\)

The 12% higher of temperatures are rejected, hence the 88th percentile is the value of interest, which is X when Z = 1.175.

Hence:

1.175 = X/1

X = 1.175 ºC.

More can be learned about the normal distribution at https://brainly.com/question/25800303

#SPJ1

Answer:

Mean: 19

Median: 6

Step-by-step explanation:

What happened when the stock decreased by $123?

Answer:w=-20

Step-by-step explanation: well, you start off by canceling the 9 subtracting 9 from both sides, to get a new equation of -w/5=4. Then, to cancel. Then, to cancel out dividing by 5, you multiply both sides by 5 to get a new equation of -w=20. Then, to cancel out the negative sign, just multiply both sides by -1, to get w=-20.

I hope this helps, it would be appreciated to get brainliest <3

Answer:

x = 5

Step-by-step explanation:

3(x-7)-4x = -26

First, we should multiply 3 to (x-7)

Next, we should combine like terms

Next, we should add 21 on both sides

Cancel out the negative sign on both sides by dividing by -1

The other endpoint of a line segment JK is K(- 6, 31).

The formula for midpoint \(x_m\) = (x₁ + x₂)/2 and \(y_m\) = (y₁ + y₂)/2.

Where x₁, y₁, and x₂, y₂ are the endpoint of the line.

Given, The midpoint of JK is point L at (-1, 8) and One endpoint is J(4, - 15).

Assuming the other endpoint(K) to be (x₂, y₂).

∴ - 1 = (4 + x₂)/2.

- 2 = 4 + x₂.

x₂ = - 6.

And,

8 = (- 15 +  y₂)/2.

16 = - 15 +  y₂.

y₂ = 31.

So, K(- 6, 31).

learn more about midpoints here :

https://brainly.com/question/28224145

#SPJ1

Answer:

would this not be a converse statement?

Step-by-step explanation:

triangle ABC is the hypothesis and it's conclusion is triangle DEF

Answer:

a

Step-by-step explanation:

Answer:

Step-by-step explanation:

8x^2 + xy - 8xy - y^2

8x^2 - 7xy - y^2

Answer:

y = x + 15

Step-by-step explanation:

If two lines are perpendicular to each other, they have opposite slopes.

The first line is y = - x - 2. Its slope is -1. A line perpendicular to this will have a slope of 1.

Plug this value (1) into your standard point-slope equation of y = mx + b.

y = 1x + b or y = x + b

To find b, we want to plug in a value that we know is on this line: in this case, it is (-5, 10). Plug in the x and y values into the x and y of the standard equation.

10 = (-5) + b

Simplify.

10 = -5 + b

Now, add 5 to both sides to isolate b.

15 = b

Plug this into your standard equation.

y = x + 15

This equation is perpendicular to your given equation (y = -x - 2) and contains point (-5, 10)

Hope this helps!

Answer:

Step-by-step explanation:

its 186

Answer:

1+-1=0 I would assume that would be sufficient unless Im underthinking it.

An equation to model the sum of the situation will be +1 - 1 = 0.

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.

Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

Given that "A hydrogen atom has a zero charge because it has been negatively charged electron and one positively charged proton."

The expression for the given situation will be written as below:-

+1 - 1 = 0

Therefore, the equation to model the sum of the situation will be +1 - 1 = 0.

To know more about expression follow

https://brainly.com/question/723406

#SPJ2

Answer:

Look at image

Step-by-step explanation:

Write the absolute value as piecewise.

a). The formula that expresses v in terms of t is v = 22 - 2t, b).  As t increases from 3 to 5, v varies from 16 to 12, c). As t varies from 3 to 5, v changes by 16 - 12 = 4.

What is the volume?

'Volume' is a mathematical quantity that shows the amount of three-dimensional space occupied by an object or a closed surface. The unit of volume is in cubic units such as m3, cm3, in3, etc. Sometimes, volume is also termed capacity.

a). The volume of water in the tank, v, decreases by 2 gallons per hour, so the formula for v in terms of t is v = 22 - 2t.

b). As t increases from 3 to 5, v varies from 16 to 12. That is, as t goes from 3 to 5, v decreases from 22 - 2(3) = 16 to 22 - 2(5) = 12.

c). As t varies from 3 to 5, t changes by 5 - 3 = 2, and v changes by 16 - 12 = 4.

Hence,  a). The formula that expresses v in terms of t is v = 22 - 2t, b).  As t increases from 3 to 5, v varies from 16 to 12, c). As t varies from 3 to 5, v changes by 16 - 12 = 4.

To learn more about the volume visit,

https://brainly.com/question/12410983

#SPJ4

The mode of the textbooks thicknesses is,

⇒ 1 cm

Since, The most frequent number which is, the number that occurs the highest number of times is called Mode of data set.

Here, We have to given that;

The librarian measured the thickness of the textbooks in the school library.

And, Among a selection of 6 books, he recorded the following thicknesses:

⇒ 4 cm, 1 cm, 1 cm, 1 cm, 5 cm, 2 cm

Hence, By definition of mode we get;

Here, Most often number in data set is, 1 cm

So, The mode of the textbooks thicknesses is,

⇒ 1 cm

Learn more about the mode visit:

https://brainly.com/question/27951780

#SPJ1