Question 1168576: 6.All else being equal, as the sample size increases, the width of a 95% Confidence
Interval…
a. …decreases.
b. …increases.
c. …remains the same
I got A am I correct?
7.A research study with a total sample size of 2,500 individuals will have more
Power than one with a sample size of 750 individuals.
a. TRUE
b. FALSE
I got A am I correct?
8.What is the lower bound of the 95% confidence interval for the data listed below?
n = 1,225 Sample mean = 42
Population standard deviation = 12 zcrit = +/- 1.96
a. 12.000
b. 41.328
c. 42.000
d. 42.019
e. 42.672
I got B am I correct?
9.
Researchers had access to population data about the number of prior arrests for offenders facing prison time in Nevada. Those data included the following: mean number of prior arrests = 4, and standard deviation = 1.5.
A group of researchers in California wanted to examine whether or not our
offenders are similar to or different than Nevada’s prisoners. However, the
researchers were only able to get access to a sample of offenders facing prison time. The sample information included the following: mean number of prior arrests = 6, and sample size = 225.
The researchers in California decided to conduct a Z-test for One Sample Mean to examine potential differences in prior arrests between the two states.
9. The value of the observed z-statistic for the hypothesis test equals…
a. … 1.18.
b. … 2.00.
c. … -1.18.
d. … -2.00.
e. … 20.00.
I got E am I correct?
10. From the results of the hypothesis test (assuming α = .05), the researchers
would…
a. … fail to reject Ho
b. … reject Ho
I got B am I correct?
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! 6. a-you are correct-narrower CI with larger sample size.
7. Yes-more power with larger sample size, everything else remaining the same.
8. Yes, you are correct.
9. Yes, you are correct.
10. Reject. Yes.
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