8
QuizMultiple Choice
Introduction to Hypothesis Testing
Question 8 • CA-Statistics and Probability B
A study found that 80% of teenagers use social media on a regular basis. John wanted to investigate if the proportion of students at his large high school who use social media is different. He takes a random sample of 90 students and finds that 64 of them use social media on a regular basis. The P-value for the test of the hypotheses, is 0.035. What is the correct interpretation of this value?
Answer
A
Only 3.5% of teenagers in this sample use social media.B
Assuming 80% of teenagers use social media, there is a 0.035 probability of getting a sample proportion of 0.71 or more that is different from 0.8.C
Assuming 80% or more teenagers use social media, there is a 0.035 probability of getting a sample proportion of 0.71 or more that is different from 0.8.D
Assuming this sample was collected correctly, the probability of getting 64 teenagers out of 90 who use social media is 0.035 if 80% of teenagers use social media.