Question 15 of 25 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
Can you train yourself to become better at holding your breath? An experiment was designed to find out. A group of 12 volunteers were randomly assigned to 1 of 2 groups. The 6 volunteers assigned to group 1 were given breath-holding exercises to perform for 2 weeks. The other group was not given any information about the experiment. At the end of the 2 weeks, all 12 volunteers were individually tested to determine how long they could hold their breath. Here are the data (in seconds):Group 1: 90, 88, 70, 110, 75, 105Group 2: 40, 48, 35, 50, 55, 62
Answer
A
Reject H0. There is convincing evidence that the volunteers who were given training held their breath longer, on average, than the volunteers without training.
B
Reject H0. There is convincing evidence that the true mean amount of time volunteers who were given training held their breath is greater than the true mean amount of time volunteers without training held their breath.
C
Fail to reject H0. There is not convincing evidence that the volunteers who were given training held their breath longer, on average, than the volunteers without training.
D
Fail to reject H0. There is not convincing evidence that the true mean amount of time volunteers who were given training held their breath is greater than the true mean amount of time volunteers without training.