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Econ 338/ envr 305 clicker questions

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

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Econ 338/ envr 305 clicker questions

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  1. Econ 338/envr 305clicker 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

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