A paper that examined the effect of a supplement on running
speed in 10 athletes reported that running speed improved an
average of 2 seconds/mile with a 90% confidence interval for the
mean of 0 to 4 seconds/mile. What is the 95% confidence interval
for the mean? There are 9 degrees of freedom; thus, the T-value for
a 90% confidence interval is 1.83 and for a 95% confidence interval
is 2.26.
a. -1.0 to 5.0
b. -0.5 to 4.5
c. 0.5 to 3.5
d. 0.0 to 4.8
A paper that examined the effect of a supplement on running speed in 10 athletes reported that running speed improved an
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answerhappygod
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