Author Question: It is believed that the median age of college students is 21 years. A sample of 85 college students ... (Read 173 times)

xroflmao · **on:** Jun 24, 2018

It is believed that the median age of college students is 21 years. A sample of 85 college students is taken. Thirty of the students were under 21, 45 of the students were over 21, and 10 were 21 years old.
a. State the null and alternative hypotheses.
b. Test the null hypothesis at the 1 level of significance.

Question 2

A graphical summary of data that is based on a five-number summary is a _____.
a. histogram
b. stem-and-leaf display
c. scatter diagram
d. box plot

ultraflyy23 · **Reply #1 on:** Jun 24, 2018

Answer to Question 1

a. H0: Median = 21
Ha: Median 21
b. z = 1.62; p-value = .1052; do not reject the null hypothesis; no evidence that the median age of college students is not 21 years.

Answer to Question 2

d