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StatisticsQ&A LibraryJUst as that you Back 22.4 24.0 at is the Calculate the F ratio and compare it to the is the effect on the F ratio of doubling the 27.0 Fratio you calculated for Exercise 5. What in mong need the he follo S ne-way standard deviations? e7A psychologist is studying various drugs on the speed of mental are divided equally into four drug condi- lems as he or she can in 10 minutes. The mean number of problems solved follows for the of the inc dc effects exploratory study, 32 selects s is metic. In an llustrat if he of arith subjects not all t tions, and each subject solves as many prob- each drug group, along with the standard deviations: А psy a chil defici Marijuana Amphetamine Valium X 7 Alcohol 5 pare 3.25 3.95 4 syc of 1 six y 3.16 2.07 a. Calculate the F ratio. b. Find the critical F (a = .05). C. What can you conclude with respect to the null hypothesis? opti rese late 8. If the study in Exercise 7 were repeated with you a total of 64 subjects: a. What would be the new value for calcu- lated F? b.Question

7 part a, b, and c

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