Chance to complete ~ Due to the rising cost of tuition, students, their parents, and government agencies that distribute

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Chance to complete ~ Due to the rising
cost of tuition, students, their parents, and government agencies
that distribute financial aid are interested in the completion rate
of a university. The completion rate is defined to be the
percentage of students who complete a 4-year degree within 6
years.Carly is working on a news article that compares this rate
across institutions. She obtains a random sample of 45 private,
4-year colleges and universities in the United States found that
the mean rate for students who complete a degree in 4 years is
0.564 with a standard deviation of 0.234.
1. Calculate a 99% confidence interval for
the actual mean completion rate for private, 4-year colleges and
universities in the United States.Give your answer to 4 decimal
places.
( , )
Carly calculated a 95% confidence interval for the mean number
of students at public 4-year universities to be (18980, 21230)
using a random sample of size 𝑛=n= 50. Calculate the
sample mean, the margin of error, and the sample standard deviation
based on the stated confidence interval and the given sample
size.IMPORTANT: Use a 𝑡∗t∗ value
rounded to THREE decimal places in any
calculations. Round non-integer results to 4 decimal places.
2. What is the sample
mean?𝑥¯=x¯=
3. What is the margin of
error?𝑀𝐸=ME=
4. What is the sample standard
deviation?𝑠=s=