A computer manufacturer estimates that its line of minicomputers has, on average,7.2days 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 is4.3, with a sample standard deviation of1.1days. Assuming that number of downtime days is normally distributed, test to determine whether these minicomputers actually average7.2days of downtime in the entire population. Let= .01.