Using the information provided indicate which statistical te

Using the information provided, indicate which statistical test you think should be used for each of the following situations:

Independent variable: normal birth weight vs. low birth weight infants; dependent variable: breathing rate (in breaths per minute).

Independent variable: time of measurement of same patient (before, during, and after surgery); dependent variable: heart rate.

Independent variable: time of measurement (before, during, and after intervention); dependent variable: did vs did not exercise regularly.

Independent variable: infertility treatment A vs infertility treatment B vs control condition; dependent variable: did vs did not become pregnant.

Solution

Independent variable: normal birth weight vs. low birth weight infants; dependent variable: breathing rate (in breaths per minute). Mann-Whitney U
Independent variable: time of measurement of same patient (before, during, and after surgery); dependent variable: heart rate. Wilocoxon Signed Ranks
Independent variable: time of measurement (before, during, and after intervention); dependent variable: did vs did not exercise regularly. Kruskall Wallis test
Independent variable: infertility treatment A vs infertility treatment B vs control condition; dependent variable: did vs did not become pregnant. Friedman test