Answer Happy

Question 15 1 pts In 2016, an organization reported that teenagers spent 3.3 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. A group of randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample mean was 3.75 hours. A two-sided hypothesis test was conducted and yielded a p-value of 0.03 with a significance level of a = 0.01. The probability of a type 1 error for this test is: O The complement of the probability of a type 2 error O 0.05 0.03 O 0.01 Question 16 1 pts An instructor wants to study the use of polling in the classroom. For which of the following scenarios would a two-sample t-test (i.e., independent samples t-test) be appropriate? The instructor wants to to determine if first-year students have different opinions on polling than seniors. They ask first-year students and seniors if they like using polling, or not. The instructor would like to determine if first-year students' scores in polling questions is significantly different than seniors' scores. Students answers in polling questions are registered and graded for each student. The instructor keeps a record of these grades, and would like to know if students achieve a mean grade of at least 75% on their polling answers, O The instructor asks students if they like using polling in the classroom or not, and they want to see if a majority if students like this learning method.