Question

19. (5 pts each) For the the statisti aced ore folowing, cirele the statistical tests that would be appropriate for the situation described ( Give the definition of symbols as well as the null and alternative hypotheses for the tests you c THE ANALYSIS designs a study to evaluate the effect of background music on the pool. Each subject is exposed to three types of background music: no ing errors. Do the results below 1) An industrial psychologist typing efficiency of from the secrlseetaries. The psychologist selects a random sample of 7 secretaries music, classical music, and hard rock music. The subject is given a standard typing test combines an assessment of speed with a penalty for typ indicate that listening to different kinds of music results in differing typing scores Music Hard RockClassical 20 Subject 24 20 27 20 18 23 18 21 24 20 24 28 16 25 18 19 a. Paired sample t-test c. One Way ANOVA e. Two Way ANOVA g. Multiple Regression i. Mann-Whitney U test b. 2 Independent samples t-test d. Blocked ANOVA f. Simple Linear Regression h. Wilcoxon Signed Rank Test j. Kruskal-Wallis test

Answer 1

as sample sujects are used for all three treatments therefore correct test to be used is Blocked ANOVA option D

let $\mu$i is the mean of treatment group of population i.

Null hypothesis:Ho :$\mu$_{No music} =$\mu$_{Hard Rock} =$\mu$_Classical

Alternate hypothesis:Ha: at least one of the means differ.