Question

Can someone please explain how to do this I am very confused and it is due tomorrow

Directions: Write the null and alterate hypothesis, determine the appropriate t-test for each of the following problems, decide upon a decision rule, draw the rejection region, and write a statement that describes the relationship the researcher is entitled to make. (You may use Excel to calculate means, variance and standard deviation) 1. An investigator predicts that individuals that fit the Type A Behavior Pattern (highly competitive and time conscious) will have higher scores on a questionnaire measure of need for achievement that individuals that fit the Type B Behavior pattern (absence of Type qualities). The investigator collects need for achievement scores from 10 Type A subjects and 10 Type B subjects. Higher scores reflect greater levels of need for achievement. Type A Type B 12 8 10 10 8

Answer 1

We use two-sample t-test with unequal variance assumption.

We use a = 0.05 as significance level. Null Ho: Ma = ub; Alternate H1 : Ha > Ho Sample Data ; la = 11.2;_sa = 2.699; Ob = 7.2; sh = 2.043; Test Statistics : ttest = = 3.736 Degree of feedom (sana + sž/ng)2 ?= 2 = 17(appprox) getting + strani p - value = Prat > 3.736) = 0.0082 Since p-value < significance level, we reject null hypothesis and conclude that Yes, there is sufficient evidence to say that type A has higher mean score than B.

Rejection dof=17 Region Cat &=0.05) Accept Region 7 Rejection Region to 1.74 CA