Statistics 13C
Homework # 7 (Part 2)
For discussion, Tues, 11/18/08
F. J. Samaniego
From the text: (hypothesis tests dealing with μ) Chap. 10: Problems: # 5, 7,
113; (two sample tests for means) Chap. 9: # 18, 21; Chap. 10: # 34, 91;
(tests for p) Chap. 9: # 30, 39; (two sample tests for proportions) Chap. 9:
#45, 63.
Also, solve the following problems:
1. Last year, School Superintendent Frieda B. Mee changed the curriculum
in her school district. Ms. Mee’s students took three standardized tests per
day.
Last year, 46% of the students in her district scored above grade level
on the statewide test.
This year, in a random sample of 256 students from
Ms. Mee’s district (the sample size required by the state’s “bonus” program),
128 students scored above grade level.
Let p be the proportion of Frieda’s
current students who score above their grade level this year. In order for Ms.
Mee’s school district to qualify for a $100,000 bonus, the district must
demonstrate a statistically significant improvement in students scoring above
grade level. Test the hypothesis H
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 Spring '07
 Leong
 Statistics, Statistical hypothesis testing, Randomness, Superintendent, Frieda B. Mee

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