write my assignment 4561

A computer manufacturer estimates that its line of minicomputers has, on average, 8.7 days of downtime per year. To test this claim, a researcher contacts seven companies that own one of these computers and is allowed to access company computer records. It is determined that, for the sample, the average number of downtime days is 5.8, with a sample standard deviation of 1.6 days. Assuming that number of down-time days is normally distributed, test to determine whether these minicomputers actually average 8.7 days of downtime in the entire population. Let α = .01.Round your answer to 2 decimal places, the tolerance is +/-0.01.The value of the test statistic is and we :then it also asks if it rejects the null hypothesis or fails to reject the null hypothesis