EPPP Exam Questions Already Rated A+
1. In which type of graph do the bars touch to indicate the overlapping nature of the data? - a) bar graph - b) histogram ️ - c) pie chart - d) scatterplot
2. Which scale of measurement is dichotomous/categorical and does not have a specific order, equal
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1. In which type of graph do the bars touch to indicate the overlapping nature of the data?
- a) bar graph
- b) histogram ✔️
- c) pie chart
- d) scatterplot
2. Which scale of measurement is dichotomous/categorical and does not have a specific order, equal
intervals, or an absolute zero?
- a) nominal ✔️
- b) ordinal
- c) interval
- d) ratio
3. Which scale of measurement would be used to measure the places achieved in a horse race?
- a) nominal
- b) ordinal ✔️
- c) interval
- d) ratio
4. Which scale of measurement would be used to measure temperature?
- a) nominal
- b) ordinal
- c) interval ✔️ (no absolute zero)
- d) ratio
5. Which scale of measurement would be used to measure reaction time in seconds?
, - a) nominal
- b) ordinal
- c) interval
- d) ratio ✔️
6. Which type of distribution is peaked?
- a) platykurtic
- b) kurtosis
- c) leptokurtic ✔️
7. In a positively skewed distribution, which has the largest value?
- a) mean ✔️
- b) median
- c) mode
8. In a negatively skewed distribution, which has the largest value?
- a) mean
- b) median
- c) mode ✔️
9. What should you use as a measure of central tendency when there are outliers?
- a) mean
- b) median ✔️
- c) mode
10. What should you use as a measure of central tendency when there are no outliers?
- a) mean ✔️ (it is more precise)
- b) median
, - c) mode
11. Which of these is not a prediction of the central limit theorem?
- a) as sample size increases, the sampling distribution of the mean approaches a normal distribution
- b) mean of the sample should equal the population mean
- c) the median of the sample should equal the population median ✔️
- d) SD of the sampling distribution should equal the population SD divided by the square root of the
sample size
12. What is the level of significance?
- a) alpha ✔️
- b) beta
- c) 1-alpha
- d) 1-beta
13. What refers to the tendency to incorrectly reject the null hypothesis?
- a) Type I error ✔️
- b) Type II error
14. What error is made when the researcher accepts the null hypothesis but it is actually false?
- a) Type I error
- b) Type II error ✔️
15. The probability of making a Type I error is:
- a) alpha ✔️
- b) beta
- c) 1-alpha
- d) 1-beta
, 16. The probability of making a Type II error is:
- a) alpha
- b) beta ✔️
- c) 1-alpha
- d) 1-beta
Increased power refers to the:
a) ability to correctly reject the false null hypothesis
b) ability to correctly accept the false null hypothesis ✔️a) ability to correctly reject the false null
hypothesis
All of these increase statistical power except:
a) reducing alpha (.01 instead of .05)
b) large sample size
c) one-tailed test
d) controlling for extraneous variables ✔️a) reducing alpha (.01 instead of .05)--power is increased by
increasing alpha (but this also increases the probability of making a Type I error); decreasing alpha gives
you more confidence but less power
Which of the post hoc analyses are vulnerable to a Type I error?
a) Scheefe
b) Tukey
c) Fishers ✔️Fishers; the others are vulnerable to a Type II error
Which statistical test is suitable for using on nominal data?
a) chi-square
b) Mann-Whitney U
c) t-test
d) multiple regression ✔️a) chi-square
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