Question

question 9
score: 4.75/11 answered: 5/11
according to facebooks self - reported statistics, the average facebook user has 130 facebook friends. for a statistics project a student at contra costa college tests the hypothesis that ccc students will average more than 130 facebook friends.
she randomly selects 3 classes from the schedule of classes and distributes a survey in these classes. her sample contains 45 students.
here are the null and alternative hypotheses for her study: ( h_0: mu = 130 ), ( h_a: mu>130 ).
what does ( mu ) represent in these hypotheses?
mean number of facebook friends for the average user
mean number of facebook friends for the ccc students in her sample
mean number of facebook friends for ccc students
question help: ( square ) message instructor

Explanation:

In hypothesis testing, the population parameter (here, μ) represents the mean of the entire population of interest. The study is about CCC students' Facebook friends, so μ is the mean number of Facebook friends for all CCC students (the population). The sample mean would be for the 45 - student sample, and the average user is the general Facebook user (not the population here). So μ represents the mean number of Facebook friends for CCC students.

Answer:

mean number of Facebook friends for CCC students