13 May 6) Refer to question 5. What is a?
)The heights (in feet) of a sample of five randomly chosen students from School x are 6.3, 6.1, 5.7, 5.8, and 6.2. Determine a 90% confidence interval for the mean height of all students at School x.
a. 6.02 ± 1.645*[.259/sqrt(5)]
b. 6.02 ± 2.015*[.259/sqrt(5)]
c. 6.02 ± 2.132*[.259/sqrt(5)]
d. 6.02 ± 1.28*[.259/sqrt(5)]
e. 6.02 ± 2.132*[.259/sqrt(4)]
2) Refer to question 1. What is a?
a. 0
b. .05
c. .1
d. .5
e. .9
3)To determine how many hours per week freshmen college students watch television, a random sample of 225 students was selected. It was determined that the students in the sample spent an average of 35 hours watching TV per week. The population standard deviation is known to be 12 hours. Provide a 95% confidence interval estimate for the average number of hours that all college freshmen spend watching TV per week.
a. 35 ± 1.645*[12/sqrt(225)]
b. 35 ± 1.96*[12/sqrt(225)]
c. 35 ± 1.645*[3.46/sqrt(225)]
d. 35 ± 1.96*[12/sqrt(224)]
4.) Refer to question 3. Compute the population standard deviation.
a. 35
b. 12
c. .8
d. .053
5)A supermarket wants to test whether the mean weight of the cans of peas sold by a particular maker equals 24 oz. It chooses a random sample of 16 cans and finds that the sample mean is 23.3 oz and the sample standard deviation is .4 oz. Your job is to test, at the 5% level of significance, whether or not the mean weight equals 24 oz.
What are the null and alternative hypotheses?
a. Ho: μ = 24, Ha: μ ≠ 24
b. Ho: μ ≤ 24, Ha: μ > 24
c. Ho: μ ≥ 24, Ha: μ 40
c. Ho: μ ≥ 40, Ha: μ < 40
d. Ho: μ = 43, Ha: μ ≠ 43
6) Refer to question 5. What is a?
a. .95
b. .025
c. .05
d. .10
7) Refer to question 5. What is (are) your critical value(s)? Remember, the critical value(s) define your rejection region.
a. 1.96
b. ± 1.96
c. ± 1.645
d. ± 2.120
e. ± 2.131
8)Refer to question 5. What is the value of your test statistic?
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