New research from Roy Morgan Shows that Australians aged 6-13 spent an average of more than 5.5 hours a week online, in 2020. A random sample of 20 children in Sydney aged 6-13 was collected and their...

New research from Roy Morgan Shows that Australians aged 6-13 spent an average of more than 5.5 hours a week online, in 2020.

A random sample of 20 children in Sydney aged 6-13 was collected and their average time online was 15.9 hourd a week with a standard deviation of 3.2 hours a week. Does this sample provide enough evidence that young Australians in Sydney aged 6-13 spent an average of more than 15.5 hours a week online? test at 5% level.