{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

100BHWwinter2009

# 100BHWwinter2009 - 5 Should we reject H Problem 3 Suppose...

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

STAT 100B HWI Due next Wed in class Problem 1: Suppose in a population of voters, the proportion of those who support a candidate is p . Suppose we get a random sample of 1000 people, and within this sample, the number of people who support this candidate is 530. (1) Calculate the 95% confidence interval for p . Calculate the margin of error. (2) Interpret the confidence level of 95% (so that your roommate can understand you). Problem 2: Continue from Problem 1. Suppose we want to test the hypotheses: H 0 : p = . 5 versus H 1 : p > . 5. (1) Calculate the p-value. (2) Suppose the significance level is 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . 5%. Should we reject H ? Problem 3: Suppose we want to test whether a die is fair or not. In particular, we suspect that the probability of getting a “six” is greater than 1/6. We roll the die 1000 times, and the number of “six” we observe is 180. (1) Suppose the signiﬁcance level is 2 . 5%. Should we declare that the die is not fair? (2) If the die is indeed not fair, and the probability of getting a “six” is .2. If the signiﬁcance level of the test is 2 . 5%. Calculate probabilities of type I error and type II error. 1...
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