Question

A study at a college in the west coast reveals that, historically, 45% of the students are minority students. If random samples of size 75 are selected, 80% of the samples will have less than ____ % of minority students. Can you explain thoroughly? I don't understand about this equation P80=P+2st.dev error.

Answer #1

In a study of government financial aid for college students, it
becomes necessary to estimate the percentage of full-time college
students who earn a bachelor's degree in four years or less. Find
the sample size needed to estimate that percentage. Use a 0.03
margin of error and use a confidence level of 99%. Complete parts
(a) through (c) below. . Assume prior studies have shown that
about 45% of full-time students earn bachelor's degrees in four
years or less
n=?

Suppose that a previous study has indicated that 45% of college
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distance of 3% of p?

In a study of government financial aid for college students, it
becomes necessary to estimate the percentage of full-time college
students who earn a bachelor's degree in four years or less. Find
the sample size needed to estimate that percentage. Use a 0.04
margin of error and use a confidence level of 90%.
a.) Assume that nothing is known about the percentage to be
estimated.
b.) Assume prior studies have shown that about 40% of full time
students earn BA...

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Sleep – College Students: Suppose you perform a
study about the hours of sleep that college students get. You know
that for all people, the average is about 7 hours. You randomly
select 45 college students and survey them on their sleep habits.
From this sample, the mean number of hours of sleep is found to be
6.1 hours with a standard deviation of 0.97 hours. You want to
construct a 99% confidence interval for the mean nightly hours of...

In a study of government financial aid for college students, it
becomes necessary to estimate the percentage of full-time college
students who earn a bachelor's degree in four years or less. Find
the sample size needed to estimate that percentage. Use a 0.03
margin of error and use a confidence level of 99%. Complete parts
(a) through (c) below. a. Assume that nothing is known about the
percentage to be estimated. n= ?

In a study of government financial aid for college students, it
becomes necessary to estimate the percentage of full-time college
students who earn a bachelor's degree in four years or less. Find
the sample size needed to estimate that percentage. Use a 0.04
margin of error and use a confidence level of 95%. Complete parts
(a) through (c) below. a. Assume that nothing is known about the
percentage to be estimated.

In a government study of financial aid for college students, it
becomes necessary to estimate the percentage of full-time college
students who earn a bachelor's degree in four years or less. Find
the sample size necessary to limit the margin of error to 5% at the
95% confidence level.

Sleep – College Students: Suppose you perform a study about
the hours of sleep that college students get. You know that for all
people, the average is about 7 hours. You randomly select 45
college students and survey them on their sleep habits. From this
sample, the mean number of hours of sleep is found to be 6.2 hours
with a standard deviation of 0.97 hours. We want to construct a 95%
confidence interval for the mean nightly hours of...

Sleep
– College Students: Suppose you perform a study about the hours of
sleep that college students get. You know that for all people, the
average is about 7 hours. You randomly select 45 college students
and survey them on their sleep habits. From this sample, the mean
number of hours of sleep is found to be 6.2 hours with a standard
deviation of 0.97 hours. We want to construct a 95% confidence
interval for the mean nightly hours of...

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