Reality TV and cosmetic surgery. Refer to the Body Image: An International Journal of Research (March 201 0) study of the impact of reality TV shows on a college student’s decision to undergo cosmetic surgery, Exercise 12.43 (p. 715). The data saved in the file were used to fit the interaction model, E(y) = β0 + β0x1 + β2x4 + β3x1x4, where y = desire to have cosmetic surgery (25-point scale), x1 = {1 if male, 0 if female}, and x4 = impression of reality TV (7-point scale). From the SPSS printout (p. 715), the est1mated equation is:
- a. Give an estimate of the change in desire (y) for every 1-point increase in impression of reality TV show (x4) for female students.
- b. Repeat part a for male students.
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Statistics for Business and Economics (13th Edition)
- The main effect(s) is (are) meaningless to be investigated and interpreted when A. we fail to reject the null hypothesis for the interaction effect. В. we reject the null hypothesis for the interaction effect. there is no significant interaction effect between the factors on the response variable. C. D. there is no significant effect of main effect on the response variable. A B Answer:arrow_forwardIs there a relationship between total team salary and the performance of football teams? For a recent season, a linear model predicting Wins (out of 16 regular season games) from the total team Salary (SM) for 32 teams in a football league is Wins = -6.353 +0.105 Salary. Complete parts a through h below. a) What is the explanatory variable? The explanatory variable is because b) What is the response variable? The response variable is because c) What does the slope mean in this context? in this league, team (Type an integer or a decimal. Do not round.) are, on average, about higher for every d) What does the y-intercept mean in this context? Is it meaningful? V is This v meaningful because it The y-intercept is the average of a team in this league whose is (Type an integer or a decimal. Do not round.) e) If one team spends $10 million more than another on salary, how many more games on average would the first team be predicted to win? O game(s) (Type an integer or a decimal. Do not…arrow_forwardSickle Cell Disease. A study published by E. Anionwu et al. in the British Medical Journal (Vol. 282, pp. 283–286) examined the steady-state hemoglobin levels of patients with three different types of sickle cell disease: HB SC, HB SS, and HB ST. Use the following boxplots to compare the hemoglobin levels for the three groups of patients, paying special attention to center and variation.arrow_forward
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- Northern flying squirrels eat lichen and fungi, which makes for a relatively low quality diet. The authors of the paper "Nutritional Value and Diet Preference of Arboreal Lichens and Hypogeous Fungi for Small Mammals in the Rocky Mountains" + measured nitrogen intake and nitrogen retention in six flying squirrels that were fed the fungus Rhizopogon. Data read from a graph that appeared in the paper are given in the table below. (The negative value for nitrogen retention for the first squirrel represents a net loss in nitrogen.) Nitrogen Intake, x (grams) 0.03 0.10 0.07 0.06 0.07 0.25 (a) Construct a scatterplot of these data. y 0.10 0.05 -0.05 y 0.10 0.05 -0.05 0.05 0.10 g 0.05 0.10 Nitrogen Retention, y (grams) -0.04 0.00 0.01 0.01 0.04 0.11 g + 0.15 0.20 0.25 0.15 ●● 0.20 0.25 X y 0.10 0.05 -0.05 y 0.10 0.05 -0.05 (b) Find the equation of the least-squares regression line. (Round your values to five decimal places.) ŷ = 0.05 0.10 0.15 0.20 0.25 0.05 0.10 0.15 0.20 0.25 (c) Based on…arrow_forwardA study was conducted to assess the influence of various factors on the start of new firms in the computer chip industry. For a sample of 70 countries the following model was estimated: ŷ = -59.31 + 4.983x1 + 2.198x2 + 3.816x3 – 0.310x4 (1.156) (0.210) (2.063) (0.330) -0.886x5 + 3.215x6 + 0.85x7 (3.055) (1.568) (0.354) R2 = 0.766 where ŷ = new business starts in the industry X1 = population in millions X2 = industry size x3 = measure of economic quality of life measure of political quality of life measure of environmental quality of life measure of health and educational quality of life X4 X5 X6 = x7 = measure of social quality of life The numbers in parentheses under the coefficients are the estimated coefficient standard errors. (a) Determine which coefficients in the model are statistically significant? Provide a justification for your answer. (b) Is the overall regression equation statistically significant at the 1% level? Justify your answer.arrow_forwardObtaining significant interactions guarantees that ALL of the main effects will statistically significant as well. true or falsearrow_forward
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