For numbers 3 to 8, refer to the given situation: Erwin believes that with his current internet subscription, he can download a 750 mb movie in just 14 minutes. In order to test his own claim, he took...

What is the test statistics? From the problem in the picture

Extracted text: For numbers 3 to 8, refer to the given situation: Erwin believes that with his current internet subscription, he can download a 750 mb movie in just 14 minutes. In order to test his own claim, he took a random sample of 10 downloading time obtained a mean of 14.75 minutes with standard deviation of 1.75 minutes.