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R.R. Jha, Bachelor's Degree

Category: Calculus and Above

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Experience: Math Expert

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A formal statement that there is an absence of relationship

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A formal statement that there is an absence of relationship between variables when tested by a researcher is called: (Points : 1) Null hypothesis Type I error Type II error Negative interval

2. Bivariate statistics refers to the statistical analysis of the relationship between two variables. (Points : 1) True False

3. Positive relationships between two variables indicate that, as the score of one increases, the score of the other increases. (Points : 1) True False

4. A result that is probably not attributable to chance is: (Points : 1) Type I error Type II error Statistical significance In the semi-quartile range

5. A score that is likely to fall into the middle 68% of scores of a normal distribution will fall inside these values: (Points : 1) . +/- 3 standard deviations +/- 2 standard deviations +/- 1 standard deviation semi-quartile range

6. It is important to assess the magnitude or strength of a relationship because this assists you with deciding whether or not a variable A causes variable B. (Points : 1) True False

7. In a negative relationship, as the score of one variable decreases, the score on the second variable decreases. (Points : 1) True False

8. A set of subjects, usually randomly sampled, selected to participate in a research study is called: (Points : 1) Population Sample Mode Group Partial Selection

9. A perfect negative relationship between two variables is expressed as r=0. (Points : 1) True False

10. When examining the relationship between a nominal variable and an interval or ratio variable, you would create a table using the nominal variables, calculate the mode and median of the interval or ratio variable, then make a decision regarding the relationship using the mode and median. (Points : 1) True False

11. A Z score of +/-1.96 is equivalent to these values on a normal distribution. (Points : 1) Critical region +/-1 standard deviation +/-2 standard deviations +/-3 standard deviations

12. An assumption used by statisticians which states that population parameters are normally distributed: (Points : 1) Central Limit Theorem Null Hypothesis Statistical significance Standard deviation

13. When examining the relationship between two interval or ratio level variables, you can use a scatterplot to allow you to visualize the relationship between the two. (Points : 1) True False

14. Correlation coefficients, r, range from -1.00 to +1.00. (Points : 1) True False

15. An entire set of individuals or objects having some common characteristics is: (Points : 1) Sample Population Median Group Complete selection

16. Data which uses number values, has an equal distance between values, and has a meaningful value of zero is: (Points : 1) Interval Nominal Ordinal Ratio

17. To determine the proportion of variability in one variable that can be accounted for or explained by the variability of a second variable, you would calculate a correlation coefficient, then square it. (Points : 1) True False

18. A significant finding with the 2 sample t-test indicates a strong relationship exists between the 2 population means. (Points : 1) True False

19. Data which uses number values with an equal distance between values are: (Points : 1) Nominal Ordinal Normal Interval

20. Data which uses numbers to provide categories or labels as well as the ordering of the categories are: (Points : 1) Nominal Ordinal Ratio Interval

21. Not all variables retained in a regression model are required to be significant. (Points : 1) True False

22. Parametric tests can be used with any type of data. (Points : 1) True False

23. This term refers to how data spreads out or disperses within a distribution. (Points : 1) Variability Critical region Range Mode

24. Relevant data that are expressed in numerical form are called: (Points : 1) Qualitative data Quantitative data Standard data Multiplicative data

25. It is not necessary to look at the frequency distribution if the mean, median, and mode are known. (Points : 1) True False

26. Causation is synonymous with association. (Points : 1) True False

27. The area of the theoretical distribution where the researcher will reject the null hypothesis is called: (Points : 1) +/- 1 standard deviation Semi-quartile range Critical region Standard deviation

28. The arithmetic average of the data is called the: (Points : 1) Mean Median Mode Variab