Question

Hypothesis Test

All of the following questions with the header "Hypothesis Test" are based on the data in this problem.

The researcher from the Annenberg School of Communications is interested in studying the factors that influence how much time people spend talking on their smartphones. She believes that gender might be one factor that influences phone conversation time. She specifically hypothesizes that women and men spend different amounts of time talking on their phones. The researcher conducts a new study and obtains data from a random sample of adults from two groups identified as women and men. She finds that the average daily phone talking time among 15 women in her sample is 42 minutes (with a standard deviation of 6). The average daily minutes spent talking on the phone among 17 men in her sample is 38 (with a standard deviation of 5). She selects a 95% confidence level as appropriate to test the null hypothesis.

Please identify the independent variable for the researcher's hypothesis, unit of analysis, and the alpha

Answer 1

Researcher wanted to know the factors which influences  how much time people spend talking on their smartphones.

So, dependent variable is the time spend talking on smartphones

Researcher selected gender because she  believes that gender might be one factor that influences phone conversation time

So, independent variable is gender. It is a dummy variable, so we can assume gender = 0 for man and gender =1 for woman.

Unit of analysis is individual adult because a random sample of adults is used to conduct the hypothesis.

Alpha = 1-confidence level

=1-0.95

= 0.05

So, alpha = 0.05