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 Advanced Statistics Advanced Probability and Statistics Math Forum

May 4th, 2014, 11:09 PM   #1
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Joined: May 2014
From: texas

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Need to check my answers

Could anyone give me the answers to this practice test so i can check mine?
Ive uploaded a screenshot since all of the parts of the questions couldnt be copied.

1. Let  = 65,  = 5, and n = 25; compute P(64  x  67).

2. Let p = :48 and n = 500; compute P(^p  :5).

3. Let ^p =
722
4013; compute a 90 percent con dence interval for p.

4. Let x = 219,  = 35; n = 100; compute a 90 percent con dence interval for .

5. Let x = 43:18; s = 21:46; n = 411; compute a 90 percent con dence interval for .

6. In a sample of size n = 1000, the number of successes is 730. One has the following hypothesis test of the
value hypothesized for the population proportion:
H0 : p = :5
Ha : p > :5

7. Given data
3.8 5.89 4.92 3.88 2.65 5.57 6.39 3.24
together with x = 4:54 and s = 1:34, test the following hypothesis of :
H0 :  = 3:57
Ha :  > 3:57
at a signi cance level of = :05. Decide whether to reject or fail to reject this hypothesis at a signi cance
level of = :05.
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