Homework #1:
1. A random sample of 20 high schoolers had a sample mean of 600 and sample standard deviation
of 10 for the SAT math section. Find a 99% confidence interval for mu.
2. A random sample of 100 washers from manufacturer A had a sample mean thic

Week 23 Textbook Assignment
pages 562 to 565: #41, 43, 46, 48, 49, 51, 55, 57 to 60
41. State: The null hypothesis is p = 0.37 and the alternate hypothesis is p > 0.37. p is the actual
proportion of satisfied students.
Plan: A one-sample z test is needed.

Week 22 Textbook Assignment
pages 546 to 549: #1, 4, 8, 9, 11, 14, 19, 20, 24, 27 to 30
1. The null hypothesis is p = 0.12 while the alternative hypothesis is p does not = 0.12. The parameter p is the proportion of left-handed students in Simons school.
4

Week 24 Textbook Assignment
pages 587 to 593: #71, 73, 75, 77, 89, 96, 100 to 102
71. State: The null hypothesis is = 0 and the alternative hypothesis is > 0. is the actual
mean of how much sweetness is lost.
Plan: A one-sample t test is needed for . The

Week 26 Textbook Assignment
pages 652 to 659: #39, 42, 43, 45, 51, 53, 60, 67 to 70
39. The normal condition isnt met because n1 and n2 are both < 30.
42. The random condition isnt met because it isnt stated that the samples were random.
43. a) The center

Week 29 Textbook Assignment
pages 724 to 731: # 29, 35, 43, 45, 51, 53 to 58
29. a) The null hypothesis is that there isnt any difference in the distribution of sports goals for
male and female undergraduates. The alternative hypothesis is that there isnt

Week 23 Terminology Review
(1) If the correlation between the number of hours a student studies for an exam
and the student's exam score is 0.70 then 70% of the reason why a student's
exam score is the value it is, is due to the number of hours the studen

Week 20 Textbook Assignment
pages 496 to 498: #27, 32, 33, 35, 41, 44, 49 to 52
27. The random condition is met because an SRS of 50 of 175 seniors are interviewed. The normal condition is met because n p-hat = 14 > 10 and n(1 p-hat) = 36 > 10. The indepe

Week 19 Textbook Assignment
Pages 481 to 484: #9, 11, 13, 17, 20, 21 to 24
9. I think the confidence level used was the 80% one. The true mean of the population was only
captured by 84% of intervals.
11.
a) The margin of error can be described as the true

Problem 1
a: The reason I choose MA-7 to be the filter is, although the data is selected
by randomly, the data of everyday has equal chance to be chosen; besides 7
days is a week, so it more convince to consider a overall data of one week to
indicate the

Problem 1
a: The reason I choose MA-7 to be the filter is, although the data is selected
by randomly, the data of everyday has equal chance to be chosen; besides 7
days is a week, so it more convince to consider a overall data of one week to
indicate the

Homework #6 MA 2612:
1. What is the model for the sign test? Describe each term of the model. What are the
assumptions on the random error term?
2. Describe the statistical hypotheses, the test statistic, and how to calculate the p-value (3 cases)
for the

Homework 5: 2612
1. In the one way eects model, what are the formulas for the estimates
of and i ? Prove that i = 0.
2. For the overall F-test for the one way eects model, what are your
two competing hypotheses? What is the formula for your F-statistic?
W

Homework #4 2612:
1. State the form of the one way means model. Describe each term and your assumptions.
2. In the one way means model, how do we estimate the population mean for the ith population?
What formula do you use? What formula do we use to estim

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Homework #2:
Using the above SAS output, answer the following questions:
1. What is the value of the coefficient of determination? What is the interpretation of the
coefficient of determination? How does the coefficient of determination relate to the
corr