5E practice problems for exam 2
1. Use the normal approximation to the binomial distribution to nd the probability that out of 600 rolls of a fair, six-sided die at most 80 of them are ones. What is the probability that at least 120 of them are ones?
MIDTERM 1 PRACTICE WINTER 2009 PSTAT 5E
Problem 1
Here are 8 data points listed. 96 6 9 1 4 3 11 84 a) Find the mean, median, and mode for the data.
b) Explain why the median is different from the mean for this set of data.
c) Find the variance and
WELCOME TO PSTAT 5E: STATISTICS with ECONOMICS and BUSINESS APPLICATIONS Winter 2009 Course Syllabus
Instructor: Dr. John Hsu Oce: South Hall 5512 Email: hsu@pstat.ucsb.edu Preliminary oce hours: Mon &Wed 2-3 pm Lectures: MWF 1-1:50pm, BRDA 1610
He
5E practice problems for exam 1
1. (a) 212 + 36 = 248 out of the 500 husbands earn less than $75, 000. So 248 = .496. 500 (b) Out of the 252 couples that have husbands with income over $75, 000, 54 of the wives also earned 54 more than that amount. S
5E practice problems for exam 1
1. A total of 500 married working couples were polled about their annual salaries, with the following information resulting. Husband Less than $75,000 212 36
Wife Less than $75,000 More than $75,000
More than $75,000
Econ 3A - Financial Accounting - W'09
Exam # 1 - 100 points (Show all your work. Use good form. Answer all questions in your bluebook.) ANSWER KEY
PROBLEM 1 (40 points) (All except per share amounts are in millions.) a. For the year 2006, Alcoa repor
PSTAT 5E Fall 2008
Solutions to Homework 2
Chapter 4:
[so] _ 501 _ 50.49.4047
9.
4 4!46! 43-2-1
= 230,300
10. a. Use the relative frequency approach:
P(Califomia) = 1,434/2,374 = .60
b. Number not from 4 states = 2,374 -1,434 - 390 - 217 - 112 = 22
5E Final practice answers 1. In general, slope parameter b1 has a mean of 1 with a standard deviation of b1 = / (xi x)2 . (page 513 of text) Here we have 1 = .1 and = .7. To nd (xi x)2 we can use the sample standard deviation of x, which is give
5E Exam 3 practice Formulas at end are as they will be on exam.
For any hypothesis test, clearly state null and alternative hypotheses.
152) The t statistic for the data is then t = (1603.643 0 = 2.196. At this point we need to compare that t value
5E Exam 3 practice Formulas at end are as they will be on exam.
For any hypothesis test, clearly state null and alternative hypotheses.
1. The fraternity house claims that its members can drink more beer in a 2 hour period that the members of the f
5E practice problems for exam 2
1. The normal approximation will have the same mean and standard deviation as the binomial. These are 600 (1/6) = 100 and 600(1/6)(1 1/6) = 9.13. We want the area to left of 80, so 100 we calculate the z-score of 80:
FINAL EXAM PSTAT 5E HSU 12/12/00 Name Signature 1. I have two cats, Ray and Felix, who behave independently of one another. I know that at 4:00 pm there is a 0.3 chance that Ray will be in my garage and 0.9 chance that Felix will be in my garage. (a)