duffster240
New member
- Joined
- May 5, 2014
- Messages
- 2
Just a practice test and want to check the answers if theyre right.
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 condence interval for p.
4. Let x = 219, = 35; n = 100; compute a 90 percent condence interval for .
5. Let x = 43:18; s = 21:46; n = 411; compute a 90 percent condence 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 signicance level of = :05. Decide whether to reject or fail to reject this hypothesis at a signicance
level of = :05.
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 condence interval for p.
4. Let x = 219, = 35; n = 100; compute a 90 percent condence interval for .
5. Let x = 43:18; s = 21:46; n = 411; compute a 90 percent condence 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 signicance level of = :05. Decide whether to reject or fail to reject this hypothesis at a signicance
level of = :05.
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