Refer to Exhibit 7-5. The correlation is statistically significant at what level?
a. .05
c. .001
b. .01
d. None of these are true.
Ques. 2Refer to Exhibit 7-5. What are the degrees of freedom in this case?
a. 39
c. 19
b. 38
d. 18
Ques. 3Refer to Exhibit 7-4. The researchers can conclude that:
a. there is no statistically significant evidence that students who use the new ACT training will improve their ACT scores.
b. the evidence suggests the new training improves ACT scores.
c. the evidence suggests the new ACT training decreases ACT scores.
d. none of these are true.
Ques. 4Refer to Exhibit 7-4. The test is statistically significant at what level?
a. .05
c. .001
b. .01
d. It is not significant.
Ques. 5Refer to Exhibit 7-4. The degrees of freedom for the test are the
a. number of rows -1 time the number of columns -1.
b. number of pairs of numbers -1.
c. total number of cases -2.
d. none of these are true.
Ques. 6Refer to Exhibit 7-4. What is the observed value for the chosen statistic?
a. .94
c. 4.603
b. 1.172
d. None of these are true.
Ques. 7Refer to Exhibit 7-4. What is the null hypothesis?
a. m
Test 1 m
Test 2 c. m
Test 1 = m
Test 2 b. m
Test 1 m
Test 2 d. None of these are true.
Ques. 8Refer to Exhibit 7-4. What test is most appropriate for this data and hypothesis?
a. Chi square
c. Independent t-test
b. Correlated t-test
d. Pearson's r
Ques. 9Refer to Exhibit 7-3. The researcher can conclude that:
a. there is no statistically significant evidence that students who use the computer training will do any better than students using the standard methods.
b. every student who used the computer program scored higher than any student who did not use the program.
c. there is a statistically significant difference between scores of those who had computerized algebra training and those who had standard teaching methods.
d. both b and c.
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