Question

Use the following scenario to answer Questions 7-11. You are interested in studying whether the presence of friends is related to risk-taking behaviors in adolescents. You create a driving simulation game where participants are confronted with multiple obstacles in which they can choose to make a safe or risky choice (e.g., choosing to speed up or stop at a changing light). You have a group of n = 25 adolescents complete the game in the presence of two of their frierfds and a second group of n=25 adolescents complete the game alone. You count the number of times each participant chose the risky option. You conduct a two-tailed independent samples test to determine if there was a significant difference in the number of times adolescents chose the risky option when in the presence of friends compared to when they were alone. Your results are displayed in the SPSS output below; however, some of the data is missing. Boxes with missing data are labeled with the letters A and B. Group Statistics Condition Risk Erequency Friends Alone N Mean 25 62800 25 50800 Sid Deviation 325986 201900 Sid Error Mean 65197 40382 Independent Samples Test teven's Test for Equality of Venonces est for of Moon Sig 2 F df Mean Otence 120000 Sig 021 Conces 5.707 95% Confidence interval of the forence Lower Upper - 34195 274195 2.74990 1565 А Sad Error Difference 16690 10000 B 1 505 10 052 120000 7. Which of the following is the correct alternative hypothesis for this study? a. HH - H2 = 0 c. H: 4. - H20 b. H:Hp 0 d. H:He is false I 8. What number belongs in box A (show all work)? 8. Is the missing number in box B less than or greater than 05? The critical value for a two- tailed test at the a- .05 level of significance is 2.011. a. Less than os c. It cannot be determined with the b. Greater than 05 given information 9. Assume that based on the result of this study you decide to retain the null hypothesis. If d States

Answer 1

Q7:

Alternative hypothesis:

H1: µ1 - µ2 ≠ 0

Answer B.

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Q8:

df = n1+n2-2 = 25+25-2 = 48

Box A = 48

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Q8: Box B.

p-value is greater than 0.05

Answer b.