Week 6 Application Assignment (16 Points)

This assignment has 50 points in total. Your percent score out of 50 points will be multiplied by 16 to find your assignment score.

WEBSITE SATISFACTION SCORES

You are a webmaster and senior marketing analyst for a local clothing manufacturer experiencing recent growth in their business.Led by your efforts, your company recently completed a web redesign including a new system where customers can create order custom designs online.To evaluate your customers' satisfaction with the new website, you've surveyed a random sampling of 100 recent customers and asked them to rate their satisfaction on a scale from 1-5 (5 being the highest) on the following dimensions:

Overall satisfaction with your company website

Ease of navigation of the website

Ease of ordering on the website

Satisfaction with your company's customer service

Their likelihood to recommend your company to a friend

If they are likely to purchase from your company again in the future (Yes/No)

Answer the following questions about the website satisfaction data you've collected:

1.(5 pts) Calculate and display the average scores and standard deviation for the five variables scored on the 1-5 scale above: Overall satisfaction, Ease of Navigation, Ease of Ordering, Satisfaction with Customer Service, and Likelihood to Recommend.

2.(3 pts) Which area represents the biggest opportunity for improvement, and seems to be the biggest challenge with the new website?Why did you choose that area?

3.(3 pts) Which area seems to be your company's strongest area?How do you know?

4.(5 pts) Calculate and display the 90% confidence intervals for the five satisfaction variables above: Overall satisfaction, Ease of Navigation, Ease of Ordering, Satisfaction with Customer Service, and Likelihood to Recommend.Write these in interval notation: (lower limit, upper limit)

5.(5 pt) Rewrite these five confidence intervals in the form , where is the sample mean for each variable and is the margin of error.

6.(3 pts) If the confidence level (90%) and the sample size (= 100) is the same for each of these five variables, why isn't the margin of error the same for each confidence interval?

7.(5 pts) Now calculate and display the 95% confidence intervals for the five satisfaction variables above: Overall satisfaction, Ease of Navigation, Ease of Ordering, Satisfaction with Customer Service, and Likelihood to Recommend.Write these in interval notation: (lower limit, upper limit)

8.(5 pts) Rewrite these new confidence intervals in the form , where is the sample mean for each variable and is the margin of error.

9.(3 pts) When we increased the confidence level from 90% to 95%, did the margin of error increase or decrease?Why?

10.(3 pts) Suppose you wanted to decrease the margin of error on your Overall Website Satisfaction metric to 0.1.Assuming that the sample standard deviation for this score and the confidence level stayed the same, what sample size would be needed to achieve this lower margin of error?Show your work!

11.(5 pts) Calculate and display the 90% confidence intervals for the five satisfaction variables above: Overall satisfaction, Ease of Navigation, Ease of Ordering, Satisfaction with Customer Service, and Likelihood to Recommend.Write these in interval notation: (lower limit, upper limit) for those customers who say they are likely to purchase from you again.[Hint: Use the Data, Split Worksheet function in MINITAB, then re-run the confidence intervals function.]

12.(5 pts) Calculate and display the 90% confidence intervals for the five satisfaction variables above: Overall satisfaction, Ease of Navigation, Ease of Ordering, Satisfaction with Customer Service, and Likelihood to Recommend.Write these in interval notation: (lower limit, upper limit) for those customers who say they are NOT likely to purchase from you again.