The percentage of high school graduates applying to multiple colleges has been increasing over the past several years. According to the National Association for College Admission Counseling, 36% of high school students applied to seven or more College in 2015. A random sample of 350 high school graduates in 2018 was selected and 143 of them applied to seven or more Colleges. a. Construct a 90% confidence interval to estimate the actual proportion of high school graduates that applied to seven or more College in 2018.
The percentage of high school graduates applying to multiple colleges has been increasing over the past several years. According to the National Association for College Admission Counseling, 36% of high school students applied to seven or more College in 2015. A random sample of 350 high school graduates in 2018 was selected and 143 of them applied to seven or more Colleges.
a. Construct a 90% confidence
b. What is the margin of error for the sample?
c. Is there evidence that this proportion has changed since 2015 based on this sample?
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