Question :
21. Which of the following data sets would have a normal : 1201774
21. Which of the following data sets would have a normal distribution?
A. 1, 1, 1, 4, 7, 7
B. 1, 2, 3, 3, 4, 5
C. 1, 2, 2, 2, 2, 2
D. 1, 3, 4, 8, 9, 9
22. Julie has just received her scores on the Scholastic Achievement Test (SAT) and learned that her score was at the 84th percentile. Julie’s score represents a standard score of
A. 1.
B. 2.
C. 16.
D. 84.
23. If an IQ test is constructed to have a mean of 100 and a standard deviation of 16, approximately what percentage of scores falls between 84 and 116?
A. 34%
B. 95%
C. 68%
D. 50%
24. Missa is looking at a normal distribution of test scores for her Psychology 101 class. If she wanted to know how many scores in the data set are below a passing grade level, she would likely
A. run a t test.
B. conduct an analysis of variance.
C. calculate the mean, median, and mode scores.
D. determine the percentile score.
25. Richard Simmons wants to know whether his original weight-loss system (Simmons I) is as effective as his new weight-loss system (Simmons II). His results indicate that people on Simmons I lose an average of 28.5 pounds in 6 months and people on Simmons II lose an average of 30.1 pounds in 6 months. What type of statistics should Richard use to determine whether the Simmons II system is really better than the Simmons I system?
A. Inferential
B. Descriptive
C. Standard
D. Variable
26. Inferential statistics provide
A. a measure of how likely it was that a result came about by chance.
B. a correlation between the dependent variable and the independent variable.
C. information about the variability of the data.
D. a summarization of a pool of data.
27. In conducting a t test, all of the following are used to determine whether your data have statistical significance except
A. difference in means.
B. standard deviation of scores in each group.
C. difference in medians.
D. sample size of each group.
28. In Diti’s study, employees who listened to rap music produced an average of 5.71 units and employees who listened to polka music produced an average of 2.71 units. To see if the difference between these means is statistically significant, Diti should
A. calculate a correlation coefficient.
B. examine the medians.
C. conduct a t test.
D. calculate percentile scores.
29. If your research study had more than two experimental/control groups and more than one independent variable, you would have to use which of the following to interpret the results:
A. A frequency histogram
B. An analysis of variance
C. A t test
D. A correlation coefficient
30. Eunice is a new elementary school principal. One of her first projects is to determine whether students have been appropriately assigned to either the Sparrow, Blue Jay, or Robin reading group. She administers the Miller Reading Ability Test (MRAT) to all three groups. What statistical analysis should Eunice use to compare the means of the three groups?
A. Analysis of variance
B. Correlational coefficients
C. Standard deviation
D. t test
