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A sample of 70 body temperatures has a mean of 98.7. Assume that o is known to be 0.5 F. Use a 0.05 significance level

A sample of 70 body temperatures has a mean of 98.7. Assume that o is known to be 0.5 F. Use a 0.05 significance level to test the claim that the mean body temperature of the population is equal to 98.5 F, as is commonly believed. What is the value of test statistic for this testing? (Round off the answer upto 2 decimal places)

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