Question

A major company in The Northeast noted that last winter its employees averaged a 6.4 days absences during the three months of winter from December to January. In an attempt to reduce absences, the company offered free flu shots to all employees this year. From a sample of 174 people who recieved the flu shot, the average number of absences was 5.2 days, with a standard deviation of 3 days. Do these data indicate a significant decrease in the number of absences compared to last winter?Test the claim at the 0.18 level of significance.

Ho Mean= 6.4

H1 :

Left-tailed test

Two-tailed test

Right-tailed test

to  =

t-critical =

p -value =

The decision is

Answer 1