Feb 3rd, 2012
Studypool Tutor
Price: $10 USD

Tutor description

Example problems in Anova, T-Test for difference of mean, Z-test for proportion. Providing step by step solution, solved 3 different problems in detail with explanations.

Word Count: 800
Showing Page: 1/6
Problem Set #41. Last week we used Confidence Intervals to see if we could find a significant difference between the 2 work groups shown below. This week we studied a new formula for comparing the means of two independent groups. Use the data below to run that comparison.No Training ManualTraining Manual(Group 1)(Group 2)Mean = 76Mean = 86SD = 13SD = 12n=22n=23a. What would H0 and H1 be? b. Calculate the Tstat for the Groups c. What conclusions can you make? (Consider a 95% CI)Ans.We use two significant t-test based on the data provided -1. Use t-test for difference of means to unequal variance 2. Use t-test for Significance of means to equal variance Since Population variance are not equal here, We use t-test for difference of meansSet Up Hypothesis Null Hypothesis , There Is No-Significance between them Ho: u1 = u2 Alternate Hypothesis, There Is Significance between them - H1: u1 != u2Test StatisticX(Mean)=76Standard Deviation(s.d1)=13 ;Number(n1)=22Y(Mean)=86Standard Deviation(s.d2)=12; Number(n2)=23we use Test Statistic (t) = (X-Y)/Sqrt(s.d1^2/n1)+(s.d2^2/n2)to =76-86/Sqrt((169/22)+(144/23))to =-2.68| to | =2.68Critical ValueThe Value of |t ?| with Min (n1-1, n2-1) i.e 21 d.f is 2.08We got |to| = 2.6781 & | t ? | = 2.08Make DecisionHence Value of | to | > | t ?| and Here we Reject Hoa)Null Hypothesis , There Is No-Significance between them Ho: u1 = u2 Alternate Hypothesis, There Is Significance betwe

Review from student

Studypool Student
" Wow this is really good.... didn't expect it. Sweet!!!! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1823 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors