# JUst asthat youBack22.424.0at is theCalculate the F ratio and compare it to theis the effect on the F ratio of doubling the27.0Fratio you calculated for Exercise 5. Whatinmongneedthehe folloSne-waystandard deviations?e7A psychologist is studyingvarious drugs on the speed of mentalare divided equally into four drug condi-lems as he or she can in 10 minutes. Themean number of problems solved follows fortheof the incdceffectsexploratory study, 32selects sismetic. In anllustratifheofarithsubjectsnot all ttions, and each subject solvesas many prob-each drug group,along with the standarddeviations:А psya childeficiMarijuana AmphetamineValiumX7Alcohol5pare3.253.954sycof 1six y3.162.07a. Calculate the F ratio.b. Find the critical F (a = .05).C. What can you conclude with respect to thenull hypothesis?optireselate8. If the study in Exercise 7 were repeated withyoua total of 64 subjects:a. What would be the new value for calcu-lated F?b.

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7 part a, b, and c help_outlineImage TranscriptioncloseJUst 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. fullscreen
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Step 1

Here, denote µ1, µ2, µ3, µ4  as mean number of problems solved by the four groups. help_outlineImage TranscriptioncloseNull hypothesis: Ho 424= 4 That is, the mean number of problems solved is same for all groups Alternative hypothesis HaAt least one 's are not equal Here, the sample sizes for four groups are n 8n 8,n 8 andn 8. The degrees of freedom for groups is 3 (=4-1), the degrees of freedom for total is 31 (32-) and the error degrees of freedom is 27(31-4) wwe w fullscreen
Step 2

Sum of squares of treatment:

Step 3

Sum of squares o...

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