STA-201 WA 10

# STA-201 WA 10 - Melissa Stewart STA-201 January 2014...

• Homework Help
• melstewart4228
• 1
• 100% (6) 6 out of 6 people found this document helpful

This preview shows page 1. Sign up to view the full content.

Melissa Stewart STA-201 January 2014 Written Assignment 10 This written assignment draws on case study discussion exercises at the end of Chapter 8. When preparing your assignment, please identify each answer clearly by question and its number. Case Study: The “Chip Ahoy! 1,000 Chips Challenge (p.357): Answer a,b,c,e (NOT d). You must calculate results by hand (though you may use any technology of your choice to verify your answers). a. Obtain and interpret a point estimate for the mean number of chocolate chips per bag for all bags of Chips Ahoy! Cookies. ( Note: The sum of the data is 52,986.) n=42. And Sum X i (1 < i <n) = 52,986 Mean X = Sum X i /n = 52,986/42 = 1,261.57 chips per bag b. Construct and interpret a normal probability plot, boxplot, and histogram of the data.
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: c. Use the graphs in part (b) to identify outliers, if any. Given the information from the graphs in total, there are no outliers. e. Determine a 95% confidence interval for the mean number of chips per bag for all bags of Chips Ahoy! Cookies, and interpret your result in words. ( Note: = 1261.6; s = 117.6.) = 117.6 ơ Mean = 1261.6 ơ x = /√n = 117.6/√42 = 18.146 ơ Mean -2 ơ x = 1261.6 - 36.292 = 1225.308 Mean +2 ơ x = 1261.6 +36.292 = 1297.892 Confidence interval is 1225.308 – 1297.892 Given this, 95.44% confidence is that the amount of chips in a bag of Chips Ahoy Cookies is between 1225.308 to 1297.892....
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern