QuestionQuestion

Answer the questions provided below.

1. Identify and describe the descriptive statistics used in each of your NINR Landmark studies.
2. Were the descriptive statistics appropriately based on the level of measure? If yes, please explain. If no, please explain and recommend the more appropriate descriptive statistic.
3. Was the descriptive information presenting in a useful format? For example, were tables used and if so were they clearly understandable?

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In the study of Harell et al. (1996) the authors presented demographic characteristics of the experimental groups in Table 1 by using bivariate descriptive statistics in the form of crosstabs table. Frequency distributions were calculated for gender, race, grade, parental education and age as one variable and intervention or control group as the other variable. This type of descriptive statistics is often used with nominal or ordinal data with few values (Polit & Beck, 2014). In this case, the level of measurement for demographic variables was nominal and ordinal so the use of crosstabs as descriptive statistic was appropriate. The information on demographic variables was presented in clear and understandable manner using table format.

For presentation of physical variables, behavior and knowledge the authors (Harrell et al., 1996) used mean as a measure of central tendency. The authors presented in Table 2 baseline and posttest values in both groups for cholesterol, systolic and diastolic blood pressure, skin folds, body mass index, height, weight, predicted aerobic power, physical activity score and knowledge score....
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