Question

Dr. Stoney and Dr. McAuliffe both teach statistics at Shochoe Bottom University. Of interest is the difference in the mean score earned by all of Dr. Stoney’s students on the test and the mean score earned by all of Dr. McAuliffe’s students on the test. A simple random sample of 72 students who took Dr. Stoney’s test was selected, the mean score on the test for this sample of 72 students was 78.3 with a standard deviation of 11.2. An independent simple random sample of 61 students who took Dr. McAuliffe’s test was selected, the mean score on the test for this sample of 61 students was 80.2 with a standard deviation of 9.7. It is conjectured that the mean score of all students who took Dr. Stoney’s test is different from the mean score of all students who took Dr. McAuliffe’s test. If appropriate, use this information to test (BY HAND) the hypotheses at the ?? = .10 level of significance.

Answer #1

In a study of how external clues influence performance,
university professors gave two different forms of a midterm tests
to a large group of introductory students. The questions on the
test were identical and in the same order, but one test was printed
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1998). Grading only the difficult questions on the test, the
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The scores of students on the SAT college entrance examinations
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consider a simple random sample (SRS) of 30 students who took
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The standard deviation of the sampling distribution for ?¯
is?
What is the probability that the mean score ?¯ of these students
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1. LSAT is an exam that university students
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450".
This professor gave the test to a random sample of 500 students...

Entry to a certain university is determined by a national test.
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(1 point) The scores of a college entrance examination had a
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(a) What is the probability that a single student randomly
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higher?
ANSWER:
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(b) The mean of the sampling distribution of x¯x¯ is:
The standard deviation of the sampling distribution...

A local university requires that all first year students
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The president of a university claimed that the entering class
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You'd like to estimate the proportion of undergraduate students
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ANSWER:
For parts (b)...

A local university requires that all first-year students
complete a math course during first semester. This year the
university is evaluating a new online version of the course. A
random sample of n = 20 students is selected and the students are
placed in the online course. At the end of the semester, all
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of n = 20 students is M = 85. For the general population of...

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