Name Question 7 Five methods of teaching descriptive statistics are to be compar

Question

Name Question 7 Five methods of teaching descriptive statistics are to be compared. 9 students have been signed to each method. All 10-minute retention test 6 weeks later. Summaries are 10 points the 45 students took a 1-hour exam after the course and then Exam Method Traditional Learning& Discussion (D) 293 4.99 Programmed text-book instruction (R) 28.0 5.33 Programmed text-with lectures (R/L) 302 3.33 Computer instruction (C) 32.4 2.94 Computer instruction with lectures (C/L) 34.2 2.74 Does the data suggest that there is a difference among the five teaching methods with respect to true mean exam score? Use - 0.05

Explanation / Answer

Solution:

state null and alternative hypothesis

H0:All the 5 group means are equal

H1:Atleast one of the group means are different

Alpha=0.05

test statistic:F=3.431

P=0.107

p<0.05

Reject Null hypotehsis.

Accept alternative Hypothesis.

Conclusion:

There is sufficient statistical evidence at 5% level of significance to conclude that there is a difference

among the 5 teaching methods with respect to true mean exam score.

ANOVA Source of Variation SS df MS F P-value Between Groups 221.112 4 55.278 3.431 0.017 Within Groups 644.393 40 16.11 Total 865.505 44

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