In a study of the relationship between tv viewing and eating habits, a sample of 548 ethnically diverse students from massachusetts was followed over a 19-month period (pediatrics [2003]: 1321–1326). for each additional hour of television viewed per day, the number of fruit and vegetable servings per day was found to decrease on average by 0.14 serving. a. for this study, what is the response variable? what is the predictor variable? b. would the least squares regression line for predicting number of servings of fruits and vegetables using number of hours spent watching tv have a positive or negative slope? justify your choice.

Arecent study focused on the number of times men and women who live alone buy take-out dinner in a month. assume that the distributions follow the normal probability distribution and the population standard deviations are equal. the information is summarized below. statistic men women sample mean 24.85 21.33 sample standard deviation 5.54 4.93 sample size 34 36 at the 0.01 significance level, is there a difference in the mean number of times men and women order take-out dinners in a month? state the decision rule for 0.01 significance level: h0: μmen= μwomen h1: μmen ≠ μwomen. (negative amounts should be indicated by a minus sign. round your answers to 3 decimal places.) compute the value of the test statistic. (round your answer to 3 decimal places.) what is your decision regarding the null hypothesis? what is the p-value? (round your answer to 3 decimal places.)