WGU C797 Data Science and Analytics
Statistical Test Questions with answers
Determine if a relationship exists between ethnic identity (African American, Asian
American, White, Hispanic, or Latino) and type of health insurance such as private
insurance, Medicaid, or no insurance (n = 47)
✔Chi-square test
Determine the relationship between BMI, which is normally distributed, and minutes
of exercise a week, which is not (n = 12).
✔Spearman correlation coefficient
A weight-loss program enrolled 45 pairs of twins. One twin in each pair walked for 15
minutes a day. Did the walking twin lose more weight than the other twin? Weight
loss is normally distributed.
✔Paired t-test
Determine whether mothers of young children engage in lead poisoning prevention
behaviors (yes/no) before and after a nursing education intervention (n = 126).
✔McNamar Test
In a study of 84 elderly men, a researcher wants to know if systolic blood pressure,
which is normally distributed, is related to men's marital status, which is single,
married, divorced, or widowed.
✔One-way analysis of variance
A study of mentally disabled adults seeks to find out if having a visit from a therapy
pet (yes/no) significantly reduces feelings of social isolation. Social isolation is
measured on an investigator-developed scale and is not normally distributed (n =
35).
✔Mann Whitney U Test
Determine the relationship between current smoking (yes/no) and excessive snoring
as rated by the wives (yes/no) in a group of 122 men
✔Chi-square test
Determine the relationship between the average number of days in a month that
people wore a seatbelt, which is not normally distributed, before and after viewing a
graphic highway safety DVD (n = 17).
✔Wilcoxon matched-pairs test
