Question

A health psychologist is investigating a variety of factors that might contribute to the rising obesity epidemic in the U.S. She thinks that the rapid lifestyle most people live contributes to obesity by affecting the food choices people make as well as the time people take to consume their food. She devises as study to assess whether overweight individuals eat faster than normal weighted individuals. She recorded the eating time (in minutes) for customers who ordered a predetermined combo meal at a local fast food establishment, as well as her visual assessment as to whether the individual was approximately of normal weight (8 customers) or was significantly overweight (10 customers) Data is below. Test the hypothesis that overweight individuals eat faster than normal weighted individuals using an alpha level of .05.

Normal Weight Overweight 20 10 15 12 18 31 26 17 20 24 27 26 13 14

1. What would be the most appropriate statistical procedure to evaluate this hypothesis (e.g. t-test for independent means or the repeated measures t-test)?
2. Why would this be the correct test?
3. Use the steps of hypothesis testing to evaluate this hypothesis.
   1. State the hypotheses.
   2. Determine the critical value(s) of your statistic for rejecting the null based on the given alpha level/sample size/hypothesis.
   3. Calculate the statistic and show your work.
   4. Based on this statistic alone, would you reject or accept the null hypothesis?
4. Calculate the Effect Size and show your work.
5. Calculate the 95% confidence interval and show your work.
6. Write an APA formatted results section for this study, including appropriate tables and graphs.

Answer 1

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nitn2 l 6 The bt Statistic 13-56281 %) 8 ID . 53 9.8016 53 3。1308

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