Question

# 1. If the coefficient of correlation is 0.17, the percentage of variation in the dependent variable...

1. If the coefficient of correlation is 0.17, the percentage of variation in the dependent variable explained by the estimated regression equation is _____

Select one:

a. 17.00%

b. 97.11%

c. 2.89%

d. 0.03%

2. Given a data set with n = 10 observations, containing one independent variable, find the critical value for an F-test at α = 2.5% significance.

3. Hypotheses test for two samples.

Two samples are randomly selected from normal populations. The sample statistics are given below.
n1 = 18               n2 = 13
1 = 535     2 = 520
s1 = 40                s2 = 25

Use α = 0.01 to test the hypothesis that μ1 > μ2.

Select one:

a. critical value tc = ±2.763; standardized test statistic t = 1.282; fail to reject H0

b. critical value tc = -1.313; standardized test statistic t = -1.282; reject H0

c. critical value tc = ±2.771; standardized test statistic t = -1.282; reject H0

d. critical value tc = 2.467; standardized test statistic t = 1.282; fail to reject H0

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