# EDUC 812 Quiz 1

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Version 1

1. The absolute difference between the population mean and the sample mean is called the:

2. What assumption must be met for most bivariate data screening?

3. Religion coded as (1 = Catholic, 2 = Buddhist, 3 = Protestant, 4 = Islamic, 5 = Jewish, 6 = other religion) is an example of what level of measurement ?

4. A researcher wants to compare the core body temperature of male and female students while they are taking their final exam. What is the independent and dependent variables?

5. First, second, and third place in a race are examples of what level of measurement ?

6. Which notation represents a sample standard deviation:

7. Calculate the sample standard deviation for the following values of systolic blood pressure: 130, 152, 120, 107, 110, 143.

8. If the mean is 60 lbs and the median is 65 lbs, then you would have a:

9. The inclusion of an extreme outlier will affect which statistic the most:

10. If the average height of a middle school males is 52.0 inches and Joe is exactly two standard deviations taller than his classmates. Given a S.D. of 1.5 inches, how tall is Joe?

11. What is the best measure of central tendency for salaries of school employees (include salaries from the janitors all the way to the superintendent)?

12. The mean, median, and mode are the same value for what type of distribution:

13. As sample size increases, the standard error of the mean:

14. Which is an example of non-parametric statistic?

15. Identify the independnet and dependent variable in the following case.

A researcher wants to know which of five drug treatments (Group 1 = Placebo, Group 2 = Prozac, Group 3 = Zoloft, Group 4 = Effexor, Group 5 = Celexa) is associated with the lowest mean score on a quantitative measure of depression (the Hamilton Depression Rating Scale).

Version 2

1. A box and whiskers plot should be used when data screening for:

2. In this example distribution of 5 test score: (77, 77, 87, 89, 90). What does 77 best represent?

3. The mean, median, and mode are the same value for what type of distribution:

4. A researcher wants to compare the core body temperature of male and female students while they are taking their final exam. What is the independent and dependent variables?

5. If the mean is 60 lbs and the median is 65 lbs, then you would have a:

6. As sample size increases, the standard error of the mean:

7. Can the outcome of a nonexperimental study make a statement about causal relationships?

8. What is the best measure of central tendency for salaries of school employees (include salaries from the janitors all the way to the superintendent)?

9. The absolute difference between the population mean and the sample mean is called the:

10. Identify the independnet and dependent variable in the following case.

A researcher wants to know which of five drug treatments (Group 1 = Placebo, Group 2 = Prozac, Group 3 = Zoloft, Group 4 = Effexor, Group 5 = Celexa) is associated with the lowest mean score on a quantitative measure of depression (the Hamilton Depression Rating Scale).

11. For a normally distributed data set, approximately what percent of the distribution falls within Â± 2 *SD* of the mean?

12. Which notation represents a sample standard deviation:

13. What can be said about a data set with a large standard deviation?

14. First, second, and third place in a race are examples of what level of measurement ?

15. What is not the goal of data screening?

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**EDUC 812 Quiz 1**

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