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Author Question: In 2011, the student body of a state university in Alabama consists of 30 freshmen, 25 sophomores, ... (Read 140 times)

K@

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on: Jun 24, 2018
In 2011, the student body of a state university in Alabama consists of 30 freshmen, 25 sophomores, 27 juniors, and 18 seniors. A sample of 400 students taken from the 2012 student body showed that there are 138 freshmen, 88 sophomores, 94 juniors, and 80 seniors. Test with 5 significance level to determine whether the student body proportions have changed.

Question 2

Which of the following statements is false regarding the expected monetary value (EMV)?
 a. To calculate the EMV, the probabilities of the states of nature must be already decided upon.
  b. We choose the decision with the largest EMV.
  c. In general, the expected monetary values represent possible payoffs.
  d. None of these choices.


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nanny

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Reply #1 on: Jun 24, 2018
Answer to Question 1

H0: p1 = .30, p2 =.25, p3 = 0.27, p4 = .18
H1: At least one proportion differs from their specified values
Rejection region: 2 > 2.05,3 = 7.815
Test statistic: 2 = 6.844
Conclusion: Cannot reject the null hypothesis. The student body proportions have not changed since 2011, according to the data.

Answer to Question 2

C


K@

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Reply 2 on: Jun 24, 2018
:D TYSM

xiazhe

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Reply 3 on: Yesterday
Excellent

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