1. You are testing H0: M(mean) = 10 against Ha:M(mean) < 10 based on an SRS of 23 observations from a normal population. the t statistic is -3.2.
The degrees of freedom for this statistic are ...?
2. Exercise 14.19 describes a class survy in which students claimed to study an average of x bar = 118 mins on a typical weeknight. Regard these students as an SRS from the population of all first-year students at this university. Does the study give good evidence that students claim to study less than 2 hours per night on the average?
Q: Conclude: What is an appropriate conclusion for your test?
A. We do not reject the null hypothesis and conclude the average student studies less tan 2 hours per night.
B. We reject the null hypothesis and conclude the average student studies less than 2 hours per night.
C. We do not reject the null hypothesis and conclude the average student studies about 2 hours per night.
D. We reject the null hypothesis and conclude the average student studeis about 2 hours per night.