In: Statistics and Probability
You wish to test the following claim (Ha) at a significance
level of α=0.10.
Ho:μ=71.4
Ha:μ≠71.4
You believe the population is normally distributed, but you do not
know the standard deviation. You obtain a sample of size n=74 with
mean M=69.6 and a standard deviation of SD=6.5.
What is the test statistic for this sample? (Report answer accurate
to three decimal places.)
test statistic =
What is the p-value for this sample? (Report answer accurate to
four decimal places.)
p-value =
Test Statistics
The t-statistic is computed as follows:
The p-value
The p-value is the probability of obtaining sample results as
extreme or more extreme than the sample results obtained, under the
assumption that the null hypothesis is true. In this case,
The p-value is 0.0198
The complete test:
One-Sample t-test |
The sample mean is Xˉ=69.6, the sample standard deviation is
s=6.5, and the sample size is n=74. (4) The p-value |
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