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3 years ago

8

Find a 95% confidence interval for the difference in proportions, pt-po, two ways, using StatKey or other technology and percent

iles from a bootstrap distribution and using the normal distribution and the formula for standard error.

1 answer:

beks73 [17]3 years ago

4 0

A bit confusing for me to be able to answer this for you… any way you can simplify your question?

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The ages of the employees at Solar Systems, Inc. is normally distributed with a mean of 32.7 years and a standard deviation of 1

svetoff [14.1K]

Answer:

6.7% of employees at Solar Systems, Inc. are younger than 30 years old

Step-by-step explanation:

The mean of ages of the employees at Solar Systems is 32.7 years

Mean = $\mu = 32.7$

Standard deviation = $\sigma = 1.8 years$

We are supposed to find What percentage of employees at Solar Systems, Inc. are younger than 30 years old i.e.P(x<30)

So, $Z=\frac{x-\mu}{\sigma}$

$Z=\frac{30-32.7}{1.8}$

Z=-1.5

Refer the z table for p value

So,p value = 0.0668

So P(x<30)=0.0668= 6.68% = 6.7%

So, 6.7% of employees at Solar Systems, Inc. are younger than 30 years old

7 0

3 years ago

Joe has some money in his

Misha Larkins [42]

Answer:

m= x-45

Step-by-step explanation:

M represents money.

X equals the amount of the money in the account.

-45 represents what he deposited from his account.

4 0

3 years ago

Read 2 more answers

X(5)+2=244<br>help pls<br>(^_^)

arsen [322]

Simplify both sides of the equation

5x+2=244

Subtract 2 from both sides

5x+2−2=244−2
5x=242

Divide both sides by 5

$\frac{5x}{5} = \frac{242}{5}$

Answer

$\: x = \dfrac{242}{5}$

OR

$\: x = 48.4$

6 0

2 years ago

Read 2 more answers

Sally is going on a vacation with her family. In 2 hours they travel 90.5 miles. If they travel at the same speed, write an equa

Mademuasel [1]

Let d= distance in miles

Let h= time in hours

45.25h= d

3 0

3 years ago

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Use linear combination. To solve system <br> -2x+7y=10<br> X-3y=-3

Tamiku [17]

-2x + 7y = 10 ⇒ -2x + 7y = 10
   x - 3y = -3   ⇒ <u>-2x + 6y = 6 </u>
      y = 4
   -2x + 7(4) = 10
   -2x + 28 = 10
   <u> -28   -28</u>
   <u>-2x</u> = <u>-18</u>
      -2 -2
   x = 9
      (x, y) = (9, 4)

3 0

3 years ago

Read 2 more answers