3.Visitors of a webpage of a company spend 250 seconds per visit on average. In order to increase the time spent, the company redesigned the page. After the changes, a sample of 400 visitors were randomly selected. The sample mean was 260 and the sample standard deviation was 100. Based on this data can we say that the design change worked (using an alpha level of .05)?

Hint: Using Excel to find the p-value will be faster than using a t-table.

a.State the hypotheses.

b.What is the p-value?

c.Using = .05, what is your conclusion?