MATHEMATICS COLLEGE

In a study of factors affecting whether soldiers decide to reenlist, 320 subjects were measured for an index of satisfaction. The sample mean is 28.8 and the sample standard deviation is 7.3. Use the given sample data to construct the 98 percent confidence interval for the population mean.

Answers

Answer 1

Answer:

Answer:

The 98 percent confidence interval for the population mean is between 27.85 and 29.75 subjects.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = (1-0.98)/(2) = 0.01$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.01 = 0.99$ , so $z = 2.325$

Now, find M as such

$M = z*(\sigma)/(√(n))$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 2.325(7.3)/(√(320)) = 0.9488$

The lower end of the interval is the mean subtracted by M. So it is 28.8 - 0.9488 = 27.85 subjects.

The upper end of the interval is the mean added to M. So it is 28.8 + 0.9488 = 29.75 subjects.

The 98 percent confidence interval for the population mean is between 27.85 and 29.75 subjects.

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Pls help asap!!!!!!!!!!!

Answers

Answer:

I can not see it well

Step-by-step explanation:

i don't see what your asking but thanxs for the points

i'll give you free point about 40 just look asap because people may snag it

Please help me don’t know how to do it,

Answers

Answer:

7=60

6=60

5=120

4=120

2=60

1=120

Answer:

angle 4 and angle 5 is = 120degree

Step-by-step explanation:

An element with a mass of 570 grams decays by 26.7% per minute. To the nearest minute, how long will it be until there are 40 grams of the element remaining?

Answers

Answer: x ≈ 9

Step-by-step explanation:

Near the end of the picture 8.553364=x

x ≈ 9

What is the length of the hypotenuse?6 cm
6 StartRoot 2 EndRoot cm
12 cm
12 StartRoot 2 EndRoot cm

Answers

Answer:

D. 12 square root 2 cm

Step-by-step explanation:

edge2021

Create an equation to solve for x then solve for x.

Answers

Answer:

Step-by-step explanation:

In parallelogram adjacent angles are supplementary

∠U +∠V = 180

9x + 15 + 6x + 15 = 180

Combine like terms

9x + 6x + 15 + 15 = 180

15x + 30 = 180

Subtract 30 from both sides

15x = 180 - 30

15x = 150

Divide both sides by 15

x = 150/15

x = 10

∠U = 9x + 15

= 9*10 + 15

= 90 + 15

∠U = 105

∠V = 6x + 15

= 6*10 + 15

= 60 + 15

∠V = 75

Answer:

Equation: $2(9x + 15 + 6x + 15) = 360$

x = 10°

∠U = 105°

∠V = 75°

Step-by-step explanation:

Hello!

The sum of angles in a parallelogram is 360°. The oppositeangles of a parallelogram are congruent.

Part A

Equation: $2(9x + 15 + 6x + 15) = 360$

Solve

$2(9x + 15 + 6x + 15) = 360$
$9x + 15 + 6x + 15 = 180$
$15x + 30 = 180$
$15x = 150$
$x = 10$

The value of x is 10°.

Part B

To find the measures of each angle, simply plug in 10° for x in each equation.

∠U

$9x + 15$
$9(10) + 15$
$90 + 15$
$105$

Angle U is 105°.

∠V

$6x + 15$
$6(10) + 15$
$60+15$
$75$

Angle V is 75°.

Convert the fractions to decimal numbers.

Answers

Answer: 0.5 as decimal 50% as pertange hope i helped

Step-by-step explanation: <3

Answer:

0.5

Step-by-step explanation:

Hopethatthisishelpful.

Haveagreatday.

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