ECN3221 Statistical Economics SECOND SEMESTER, 2021/2022
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TEST 2
SECOND SEMESTER, 2021/2022
Statistical Economics
ECN3221
Section A: Multiple Choice Questions (10 Marks)
Answer ALL questions.
1. The critical value of t for a two-tailed test with 6 degrees of freedom using α = .05 is
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2. When the following hypotheses are being tested at a level of significance of α
H0: μ 500 Ha: μ < 500
the null hypothesis will be rejected, if the p-value is
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3. In a two-tailed hypothesis test, the test statistic is determined to be z = -2.5. The p-value for this test is
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4. Read the t statistic from the t distribution table and circle the correct answer. For a one-tailed test (lower tail), using a sample size of 10, and at the 10% level of significance, t =
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5. Salary information regarding male and female employees of a large company is shown below.
|
Male |
Female |
Sample Size |
64 |
36 |
Sample Mean Salary (in $1000) |
44 |
41 |
Population Variance () |
128 |
72 |
The point estimate of the difference between the means of the two populations is
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a. |
-28. |
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b. |
3. |
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c. |
4. |
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d. |
-4. |
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7. Which of the following has a chi-square distribution?
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8. We are interested in testing whether the variance of a population is significantly less than 1.44. The null hypothesis for this test is
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9. A sample of 41 observations yielded a sample standard deviation of 5. If we want to test H0: σ2 = 20, the test statistic is
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10. The value of F.01 with 9 numerator and 20 denominator degrees of freedom is
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a. |
2.39. |
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b. |
2.94. |
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c. |
2.91. |
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d. |
3.46. |
Section B: Short Answer Questions
Answer ALL questions.
Question 1 (20 Marks)
Recently, a local newspaper reported that part-time students are older than full-time students. In order to test the validity of its statement, two independent samples of students were selected.
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2022-07-08