Question

In: Statistics and Probability

For each of the following situations, indicate whether ANOVA is appropriate; if not appropriate, the reason...

For each of the following situations, indicate whether ANOVA is appropriate; if not appropriate, the reason why not; and, if appropriate, the type of ANOVA that would be used (i.e., one-way, repeated measures, etc.):

The independent variable (IV) is age group –people in their 60s, 70s, and 80s; the dependent variable (DV) is health-related hardiness, as measured on a 20-item scale.
The IVs are ethnicity (white, African American, Hispanic, Asian) and birthweight status (<2,500 grams vs 2,500 grams); the DV is serum bilirubin levels.
The IV is maternal breastfeeding status (breastfeeds vs does not breastfeed); the DV is maternal bonding with infant, as measured on a 10-item self-report scale.
The IV is exposure to a special intervention (before vs after exposure); the DV is myocardial oxygen consumption.
The IV is length of gestation (preterm vs term vs postterm birth); the DV is epidural anesthesia during labor (yes vs no).
The IV is time since diagnosis of multiple sclerosis (1 month vs 6 months vs 2 years); the DV is psychological adaptation to the disease, as measure by the Purpose-in-Life test.

Expert Solution

(a)

In ANOVA, the independent variable is categorical and the dependent variable is continuous.

ANOVA is not appropriate because the dependent variable: health-related hardiness, as measured on a 20-item scale. is not continuous.

(b)

ANOVA is appropriate because the independent variable: ethnicity (white, African American, Hispanic, Asian) and birthweight status (<2,500 grams vs 2,500 grams); is categorical and the dependent variable : serum bilirubin levels. is continuous.

Type of ANOVA: One way

(c)

ANOVA is not appropriate because the dependent variable: maternal bonding with infant, as measured on a 10-item self-report scale. is not continuous.

(d)

ANOVA is appropriate because the independent variable: exposure to a special intervention (before vs after exposure) is categorical and the dependent variable : myocardial oxygen consumption. is continuous.

Type of ANOVA: Repeated measures

(e)

ANOVA is not appropriate because the dependent variable: epidural anesthesia during labor (yes vs no). is not continuous.

(f)

ANOVA is not appropriate because the dependent variable: psychological adaptation to the disease, as measure by the Purpose-in-Life test. is not continuous.

orchestra answered 1 year ago

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