Answer:
a. x = 40 wpm
b. MOE = 4.4 wpm.
c. If you were to create many more confidence intervals from many different random samples, you would expect 95% all of the confidence intervals to have centers and widths that include the true mean.
d. About 5% of the confidence intervals would not capture the parameter (true mean) you are trying to estimate.
Step-by-step explanation:
We have a 95% confidence interval for the mean with bounds 35.6 and 44.4.
This is estimated from a sample that, in this case, has a sample size of n=54.
The value of x, used to construct the interval, will be at the center of the interval. Then we can calculate the value of x as the average between the two bounds:
![\=x=\dfrac{UL+LL}{2}=\dfrac{44.4+35.6}{2}=\dfrac{80}{2}=40](https://tex.z-dn.net/?f=%5C%3Dx%3D%5Cdfrac%7BUL%2BLL%7D%7B2%7D%3D%5Cdfrac%7B44.4%2B35.6%7D%7B2%7D%3D%5Cdfrac%7B80%7D%7B2%7D%3D40)
The margin of error is equal to the difference between x and any of the bounds:
![MOE=UL-\bar x=44.4-40=4.4](https://tex.z-dn.net/?f=MOE%3DUL-%5Cbar%20x%3D44.4-40%3D4.4)
c. If you were to create many more confidence intervals from many different random samples, you would expect 95% all of the confidence intervals to have centers and widths that include the true mean.
d. About 5% of the confidence intervals would not capture the parameter (true mean) you are trying to estimate.
The system of inequalities that represents the number of copies that Julissa can print to meet her goal is given by:
.
.
<h3>What is a system of inequalities?</h3>
A system of equations is when two or more variables are related, and inequalities are built to find the values of each variable.
The variables are given as follows:
- Variable x: Number of color copies.
- Variable y: Number of gray scale copies.
She needs to print no fewer than 8 copies, hence:
.
It takes 4 minutes to print a color copy and 2 minutes to print a grayscale copy. She has at most 25 minutes, hence:
.
More can be learned about a system of inequalities at brainly.com/question/3656398
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Answer:
dont know and im backk
Step-by-step explanation: