# Question: a variable is a unit upon which measurements are...

###### Question details

- A variable is a. Unit upon which measurements are made b. Data collection form c. The characteristic being measured d. The realized measurement

- For what kind of data are bar graphs best suited? a. Nominal or Ordinal b. Ordinal or Interval c. Nominal or Interval d. Interval or Ratio

- Histograms display frequencies for what level of measurement? a. Ordinal b. Interval or Ratio c. Categorical d. Nominal

- The term for a value that best describes the arithmetic average in a distribution is called a. Mean b. Median c. Variability d. Central Tendency

- Total Blood Cholesterol Levels 160 160 170 150 160 170 155 350 180 155 180 160 150 180 150 180 23.

Using the descriptive statistics analysis for ‘Total Blood Cholesterol Levels’ created for the 16 patients, how does the mean value compare to the median value and the mode value?

a. These three measures of central tendency are similar. b. The mean is higher than the median and the mode. c. The mean is the preferable value to report for this data set. d. None of the above.

- Using the descriptive statistics analysis for ‘Total Blood Cholesterol Levels’ created for 16 patients and looking at the data provided, what is the most appropriate measure of central tendency to report? a. Mode b. Median c. Mean d. None of the above. 9

- Using the descriptive statistics analysis for ‘Total Blood Cholesterol Levels’ created for 16 patients, what is the coefficient off variation (CV)? a. 0.27 b. 14.68 c. 0.30 d. 13.04

-Questions 26 is based on a descriptive statistics analysis. Below are the numbers that represent Total Blood Cholesterol Levels (mg/dL) for 15 patients, following the outlier removal of the value of 350 from the data set. . Using Excel, create the descriptive statistics table for the data below. (See Module 2 for details on how to create descriptive statistics in Excel).

Total Blood Cholesterol Levels 160 160 170 150 160 170 155 180 155 180 160 150 180 150 180 26. In the descriptive statistics analysis for ‘Total Blood Cholesterol Levels’ created for the 15 patients with the removal of the outlier (350), how do these results compare to the analysis for 16 patients that includes the outlier (350)?

a. There is a decrease in the mean, standard deviation, and range; no change in the median and mode. b. There is no substantial change in any of the reported statistics. c. The distribution of ‘Total Blood Cholesterol Levels’ for 15 patients is more skewed. d. None of the above.

-When an instrument measures the construct that it is supposed to measure, you can say that the instrument has a high degree of a. Instrument Clarity b. Reliability c. Validity d. Dependability

- An instrument that consistently yields similar results with each administration of the instrument, can be said to be a. Reliable b. Valid c. Clear d. Representative

- A reliability coefficient of .55 is more highly desirable than a reliability coefficient of .80?. a. True b. False