Previous studies have shown that exposure to thin models is associated with lower body image among women (Frederick et al., 2017). A researcher designs a study to determine if very young girls are similarly affected by thin images. Forty kindergartners are randomly assigned to one of two groups. The first group plays with Barbie dolls for 30 minutes. The second group plays with a doll with proportions similar to the average American woman. After the 30-minute play period, the researcher measures each girl's body image using a graphic rating scale that yields an interval scaled measure of body image. What type of inferential test should be used to analyze this data? Group of answer choices single-sample t-test independent-samples t-test related-samples t-test z for a sample mean