Quiz 4

the mean of the following set of numbers (12, 4, 13, 20, 4, 10, 14) is: A. 11 B. 4 C. 10 D. 17

A. 11 (p. 333)

The median is represented by which score in the following frequency distribution? X: 12,11,10,9,8,7; f: 3,0,1,1,1,1 A. 9 B. 7 C. 12 D. 10

D. 10 (p. 333)

Which of the following are purposes of statistical analysis? A. Examine the numerical data gathered in a study and provide insight into the meaning of the data. B. Prove the validity of a nursing theory. C. Determine correct protocols for clinical research. D. Prove the research hypothesis to be true.

A. Examine the numerical data gathered in a study and provide insight into the meaning of the data. (p. 319)

The level of significance usually set in nursing studies is at either: A. .03 or .003 B. .005 or .001 C. .5 or .1 D. .05 or .01

D. .05 or .01. (p. 325)

Unexpected results are best dealt with in which of the following ways? A. Ignored because they are suspect findings B. Included in the final report C. Incorporated into the ongoing study D. Interchanged with the dependent variable

B. Included in the final report (p. 354)

Descriptive statistics should be reports in every study to: A. provide a powerful analysis of data. B. show the sample characteristics. C. determine validity. D. indicate reliability.

B. show the sample of characteristics. (p. 320)

Which of the following questions relates to generalization? A. Does the degree of control in the study allow for statistical significance? B. Are the findings generally significant to people in the study? C. Can these findings be applied to other groups or settings? D. How many alternative explanations or rivals hypotheses can be proposed?

C. Can these finding be applied to other group or settings? (p. 356)

A statistically significant finding means that: A. interventions should be used in clinical practice. B. results will be the same if the study is repeated with another sample. C. obtained results are not likely to have been due to chance. D. findings are clinically important and valuable.

C. obtained results are not likely to have been due to chance. (p. 512)

In interpreting findings of a study, the researcher should: A. avoid discussion of problems encountered while doing the study that might influence outcomes. B. emphasize that statistically significant findings must be incorporated into practice. C. speculate about what the findings might mean to nursing practice. D. relate findings back to the purpose and framework of the study.

D. relate findings back to the purpose and framework of the study. (p. 353-354)

Standard deviation is defined as: A. a difference score based on the lowest and highest value in the set. B. scores grouped so that the range in each set is standardized and equal. C. scores that have been standardized to have a mean of zero. D. the average difference between the mean and each of the scores in the set.

D. the average difference between the mean and each of the scores in the set. (p. 334).