A researcher in sports psychology is interested in the resting pulse rate of long-distance college runners.She does some research and finds data from the U.S.Olympics team showing their long-distance runners have a resting pulse rate of 60 beats per minute.She wants to know if the pulse rate for college runners is different from the Olympic team's m of 60.She randomly samples 20 long-distance runners,and finds
What value is obtained when calculating the test statistic?
A)1.28
B)3.93
C)70.06
D)0.88

Question

A researcher in sports psychology is interested in the resting pulse rate of long-distance college runners.She does some research and finds data from the U.S.Olympics team showing their long-distance runners have a resting pulse rate of 60 beats per minute.She wants to know if the pulse rate for college runners is different from the Olympic team's m of 60.She randomly samples 20 long-distance runners,and finds 
What value is obtained when calculating the test statistic?
A)1.28 
B)3.93 
C)70.06 
D)0.88

Quizplus · Accepted Answer

The test statistic can be calculated using the formula: 
t = (x̄ - μ) / (s / √n) 
where x̄ is the sample mean, μ is the population mean (given as 60), s is the sample standard deviation, and n is the sample size (20 in this case). Substituting the values given, we get: 
t = (59.5 - 60) / (4.4 / √20) ≈ -3.93 
Therefore, the test statistic obtained is -3.93. The correct choice is B, which matches this value.

A Researcher in Sports Psychology Is Interested in the Resting