Question

According to a study of employed U.S. adults ages 18 and over, the mean number of workdays missed due to illness or injury in the past 12 months is 3.5 days. You randomly select 25 employed U.S. adults ages 18 and over and find that the mean number of workdays missed is 4 days. Assume the population standard deviation is 1.5 days and the population is normally distributed. Is there enough evidence to doubt the study’s claim at a = 0.01? Use a P@value.

state the hypotheses and rather it left right or two tailed

compute standarized test statistic

find the p value or rejection of the scenario

make a decision whether it reject or fail to reject and give an interpertation of the deicison

Answer 1