1. Econ 338/envr 305 clicker questions
Statistics – Question Set #5 (from Chapter8)

2. The average scores in a pre-final examination scored by under graduate students in the previous year was 63. A tutor, after conducting the weekly tests, wishes to check whether that average has increased this year. For a sample of 70 students, the mean score was 68 with a standard deviation of 15. State the null and the alternative hypotheses.
H0: μ = 63 vs. Ha: μ > 63
H0: μ = 63 vs. Ha: μ ≤ 63
H0: μ = 63 vs. Ha: μ < 63
H0: μ = 63 vs. Ha: μ ≠ 63
H0: μ = 63 vs. Ha: μ ≥ 63
Response Counter

3. The average scores in a pre-final examination scored by under graduate students in the previous year was 63. A tutor, after conducting the weekly tests, wishes to check whether that average has increased this year. For a sample of 70 students, the mean score was 68 with a standard deviation of 15. Compute the value of the test statistic.
0.33
–2.79
–0.33
10.80
2.79
Response Counter

4. The average scores in a pre-final examination scored by under graduate students in the previous year was 63. A tutor, after conducting the weekly tests, wishes to check whether that average has increased this year. For a sample of 70 students, the mean score was 68 with a standard deviation of 15. Find the rejection region for the standardized test statistic at the 10% significance level.
(–∞,–1.282]
(–∞,–1.645] U [1.645, ∞
[1.282, ∞)
(–∞,–1.282] U [1.282, ∞)
[1.645, ∞)
Response Counter