Samantha has a hypothesis that listening to music while taking a test will affect the results, but she is not sure if people will do better or worse while listening to music. Samantha tests 39 participants while they listen to music,
obtaining a mean of 73.45. The mean of the population taking the test without music is 695 (standard deviation of
13).
Is this a one-tailed or two-tailed test? How do you know?
Using symbols, what are H. and H ?
Compute Zobt
Determine Zcrit
Is the result significant? How do you know?
What should Samantha conclude about the relationship between listening to music and performance on a test?