1.a is the level of probability at which the null hypothesis is rejected.

True / False

2. A measure of association is a single summarizing number that reflects the strength of a relationship between two variables.

True / False

3. In a two-sample t test, one of the assumptions is that the samples are assumed to be dependent on each other.

True / False

4. There are two types of estimates of population characteristics: point estimates and interval estimates.

True / False

5. In interval estimation, the Zscore corresponding to a 95% confidence interval is

True / False

6. In hypothesis testing with two sample means, the null hypothesis (H₀) is: ₁=_2.

True / False

7. The radius of a confidence interval is called the standard deviation.

True / False

8. Cross-tabulation is a technique for analyzing the relationship between two variables that have been organized in a graph.

True / False

9. In the Chi-square test, the number of Degrees of Freedom in a bivariate table with three rows and four columns is 3x4=12.

True / False

10. In Analysis of Variance (ANOVA), Within-group Sum of Squares (SSW) refers to the variation of scores within a singlesample.

True / False

11. According to the concept of Proportional Reduction of Error, two variables are associated when information about one can help us improve our prediction of the other.

True / False

12.In Analysis of Variance (ANOVA), SST = SSB - SSW.

True / False

13. In hypothesis testing with two sample proportions, the null hypothesis (H0):_{1 2.}

True / False

14. The smaller the c² statistic, the smaller the p value.

True / False

15. The stronger the relationship between the variables, the larger will be the reduction in the number of errors of prediction.

True / False

16. Lambda (l) may range in values from 0.0 to 1.0.

True / False

17. A Gamma of 0.0 indicates a perfect, negative association between the variables.

True / False

18. The least squares method is a technique that chooses a and b such that the residual sum of squares is the most.

True / False

19. An r^2 near zero indicates either poor fit or a well-fitting line with slope one.

True / False

20. The best-fitting line is one where the residual sum of squares is closest to zero.

True / False

21. In a linear regression equation Y=a+ bX, a is the Y-intercept and it is the value of Y when X is 0.

True / False

22. In an Analysis of Variance (ANOVA), if the obtained F statistic is greater than the F critical value, then the null hypothesis can be rejected.

True / False

23. The F statistic, also called an F ratio, is the ratio of the mean square between to the mean square within.

True / False

24. Residual sum of squares, SSE=a+bx

True / False

25. A negative slope implies the relationship between the variables is a negative one.

True / False

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1. The research hypothesis is symbolized as ______.

A. H₀

B. H

C. H₁

D. h

2. In the five-step model of hypothesis testing, which of the following is the first step? _____.

A. making assumptions

B. compute test statistic

C. making a decision and interpreting the results

D. Stating the research and null hypothesis and selecting alpha

3. The probability associated with rejecting the null hypothesis when it is true is called ______.

A. Type II error

B. Type I error

C.a

D.l

4. Making assumptions and selecting the sampling distribution are steps involved in ______.

A. interpreting the results

B. calculating the test statistic

C. statistical hypothesis testing

D. determining the mean

5. In interval estimation, Z score which is corresponding to a pre-selected confidence level is necessary. Which of the following is the Z score that is corresponding to a 99% confidence level?

A. 1.68

B. 2.58

C. 1.12

D. 0.06

6. Which of the following statements about measures of association is correct?

A. Lambda (