The mean turnaround time for samples in the virology lab is estimated at 25 minutes. To test this estimation the laboratory manager selected 100 specimens randomly and was found that the mean for the 100 selected samples was 26 minutes with a standard deviation of 4 minutes. Is the estimate justified at 0.01 level of significance based on this sample? Assume the data is normally distributed.
6.1. State the null and alternative hypothesis
6.2. Use an appropriate statistical test to test this hypothesis and give the proper conclusion. Show all 7 steps in the calculation
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