exam02_answers - STA 3024 Summer A 2011 Name: Exam 2 (Form...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
STA 3024 Summer A 2011 Exam 2 (Form Code X) Name: UFID: This is 75 minutes exam. You have to answer 20 multiple choice questions. Each question is worth 5 points that makes the whole exam worth 100 points. There is only one correct answer for each question. You need to bubble the correct answer on the scantron to get credit. Only scantron and not this exam will be graded. You have to turn in both exam and scantron . You can use a calculator but you cannot use any supplemented materials not included in this exam. On this paper , write your name and UFID . You also need to sign and date this exam below . On your scantron , bubble your name, UFID, and exam Form Code (please see upper right corner of this page for your form code.) You also need to bubble your section number which is 1053 . There are no special codes. A formula sheet and tables that you may need are provided on the back of this exam. On my honor I have neither received or given or planning to give any aid on this exam as well as disclose its contents to the ones who is going to take it after me. Name: DATE:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
QUESTION 3 HAS A TYPO. DEGREES OF FREEDOM DO NOT SUM TO TOTAL. 1. Working with F -table. In a Two-Way ANOVA F -test for the main effect of Factor A with df A = 4 and df E = 24 , which of the following test statistic values would correspond to p-values less than α = 0 . 05 ? (HINT: Please look carefully at the F -table.) (A) F A = 2 . 5 (B) F A = 3 . 0 (C) F A = 3 . 5 (D) ( A ) and ( B ). ( B ) and ( C ). 2. Two-Way ANOVA Theory. ( Class example.) In the two-way ANOVA table shown below, what is the value of the Error sum of squares SS E ? Source df SS MS Factor A (Gender) 1 353.63 353.63 Factor B (Age) 2 1520.00 760.00 Interaction 2 109.87 54.93 Error 17.88 Total 29 2412.70 SS E = 429 . 20 (A) SS E = 17 . 88 (B) SS E = 83 . 20 (C) SS E = 109 . 87 (D) Impossible to determine since we do not know the degrees of freedom for the error df E . 3. Two-Way ANOVA Theory. Using the Two-Way ANOVA table shown below, identify the sample size used to compute this ANOVA table Source df SS MS Factor A 15 150 10 Factor B 25 250 10 Interaction ( A × B ) 375 380 1 . 013 Error 833 1000 1 . 20 Total 1247 1780 (A) 1247 1248 (B) 1249 (C) 1780 (D) 1247 + 1780 = 3027
Background image of page 2
4. One-Way ANOVA assumptions and model validity. In One-Way ANOVA, which of the following is not required for the model assumptions to be valid? (A) The group sample sizes should be the same . (B) Group size n i should be at least 30 for each group we have. (C) Standard deviation for all elements in the sample is the same . That is, if we compute the group sample standard deviations, they should be at least approximately equal. Both
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

exam02_answers - STA 3024 Summer A 2011 Name: Exam 2 (Form...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online