Test Bank For Statistics and Data Analysis for Nursing Research, 2nd Edition

Chapter 2 Frequency Distributions: Tabulating and Displaying Data 2.1. A major purpose of constructing a frequency distribution with sample data is to: a. Estimate a population parameter b. Test a research hypothesis *c. Get an organized view of an entire set of scores d. Get experience with statistical software 2.2. In a frequency distribution, the two key informational components are: *a. Score values (X), frequencies (f) b. A horizontal (X) axis, a vertical (Y) axis c. Frequencies (f), percentages (%) d. Participant ID number (id), score values (X) 2.3. In a frequency distribution, which of the following is true? a. Σ N = % b. Σ N = f c. Σ f = % *d. Σ f = N 2.4. In the equation Σ % = 100.0, the symbol Σ signifies: a. A percentage *b. The sum of c. A data value d. A frequency 2.5. In a frequency distribution, percentages are sometimes called: a. Proportions b. Relative proportions *c. Relative frequencies d. Cumulative proportions 2.6. Data for which of the following variables is most likely to be presented in a grouped frequency distribution? a. Nursing specialty area *b. Daily cholesterol intake c. Number of abortions d. Number of pets owned 2.7. The level of measurement for data appropriately presented in a bar graph is: a. Interval or ratio b. Nominal only c. Interval only *d. Nominal or ordinal 2.8. In a frequency distribution graph, frequencies are typically presented on the ____ and data values are presented on the ____________. (Fill in the blanks.) *a. Y axis, X axis b. X axis, Y axis c. f axis, N axis d. N axis, f axis 2.9. Which of the following sets of data is not unimodal? *a. 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 4, 5, 5, 5, 5, 5, 5, 5, 5 b. 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 4, 4 c. 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5 d. 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 5, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9 2.10. Which of the following variables is most likely to be negatively skewed in a general population? a. Number of times arrested *b. Age at retirement c. Number of times married d. Age at birth 2.11. A normal distribution is not: a. Skewed b. Leptokurtic c. Platykurtic *d. All of the above 2.12. A wild code is: *a. A value that is impossible given the coding scheme b. An outlier or high value c. A code for which there is a very low frequency d. A code for which there is a very high frequency The next eight questions pertain to the following table (Table 2): Table 2 Frequency Number of Percentage Cumulative Pregnancies of Study Percentage Participants 0 24 11.1 11.1 1 29 13.5 24.6 2 78 36.3 60.9 3 46 21.4 82.3 4 22 10.2 92.5 5 11 5.1 97.6 6 4 1.9 99.5 7 1 0.4 100.0 Total 215 100.0 2.13 In Table 2, the variable is _______ and the measurement level is _________. (Fill in the blanks.) a. Discrete, interval *b. Discrete, ratio c. Continuous, interval d. Continuous, ratio 2.14. Table 2 is an example of a: *a. Frequency distribution b. Grouped frequency distribution c. Class interval d. Data matrix 2.15. In Table 2, the value of N is: a. 24 b. 100.0 *c. 215 d. 7 2.16. In Table 2, the cumulative relative frequency for five or fewer pregnancies is: a. 210 b. 199 c. 92.5 *d. 97.6 2.17. The best way to graph information in Table 2 would be to construct: *a. A histogram b. A pie chart c. A bar graph d. Either a pie chart or a bar graph 2.18. In Table 2, the distribution of data would be described as: a. Symmetric *b. Positively skewed c. Negatively skewed d. It cannot be determined. 2.19. In Table 2, the distribution of data would be described as: *a. Unimodal b. Bimodal c. Multimodal d. It cannot be determined. 2.20. In Table 2, the most likely number to be an outlier is: a. 0 b. 1 *c. 7 d. 24