Question

. Business owners often rely on experts in search engine optimization to increase the number of people who visit the business website. A study was conducted of 7 comparable small businesses before and after implementing a plan for search engine optimization. The number of visitors per day for each business, based on the day before and after implementing the plan, is shown.

Business number	Number of daily visitors before optimization	Number of daily visitors after optimization
1	5389	5883
2	5061	6189
3	5468	5430
4	5579	6106
5	5733	5534
6	4812	5737
7	5834	5990

(a) Explain the requirements that the data must meet to conduct the hypothesis test described in (b).

(b) Specify the hypotheses for a t-test to see whether the mean number of visitors differs before and after search engine optimization.

(b) Conduct a hypothesis test with a = 0.05, estimating the t-statistic and the p-value.

(c) Report:

the level of significance,

            the type and value of the test statistic (including degrees of freedom if appropriate),

            the p-value (exact values if possible, or a range of possible values), and

            the implications for the null hypothesis.

Do the results indicate that search-engine optimization results in an immediate increase (next day) in the number of visitors to the website?

Answer 1