Stats question T values?
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I have this problem and Im really stuck because it only has one set of data. This chapter has all had two sets of data to figure out tests statistics. Any help would be appreciated.
Assume that 10 people join a weight loss program for 3 months Each persons weight is recorded before and after the program. The following summarizes the results for the 10
Mean weight lost= 9
Sample STD. Deviation= 4.6
Assume that the hypothesis test will be conducted to determine whether or not the weight loss program was effective usina a .05 signifigance level. What is the value of the test statistic? A. t=6.19 B. t=1.96 C. Z= 1.96 or D. Z=6.19
Hi,
Since you don’t know the population’s standard deviation, you must conduct a t-test. This rules out options C and D. To decide among the other options, recall that
t = (sample mean) * √n / (sample std dev)
where ‘n’ is the sample size. I hope this helps.