A doctor speculates that the red blood cell count of adults

Last updated: 4/29/2023

A doctor speculates that the red blood cell count of adults over the age of 70 is less than the larger adult population The red blood cell count from a random sample of 42 of these older adults has a sample mean of 5 31 and a sample standard deviation of 0 54 The larger adult population has a mean of 5 4 Use a significance level of 0 01 to test whether the red blood cell count of adults over 70 is less than the larger population a What are the null and alternative hypotheses Ho 5 4 OH 5 4 Ho H 5 4 O H H 5 4 Hoi u 5 4 O H H 5 4 Ho 5 4 OH 5 4 b What is the test statistic Round to 2 decimal places c What is the p value Round to 4 decimal places d Which is the decision O Reject the null hypothesis O Fail to reject the null hypothesis e What is the interpretation of the decision There IS NOT enough evidence that the sample