BA - 3400: Quantitative Methods - II QUIZ - 3 ( 1 0 points) , Due Date: July 14 th , 2015 by 11:59 pm Instructions: This quiz has a total of 2 0 multiple choice questions (MCQ) half point each . A ll questions are compulsory. S ome questions have up to 5 alternatives, while other questions have fewer alternatives but there is only one correct answer. Consider all alternatives before selecting the best one in your opinion . You will have 60 minutes to complete this once started online to submit your responses, through the submission link on BB , with a maximum of three attempts to improve your score, if needed. It is advised you fist complete the quiz below at your convenience & time , select the responses and then attempt to submit the responses on line. Some questions are based on two sets of SPSS tables, one for ANOVA and other for Chi - Square Test. 1. Differences analysis involves the following type(s) of tests ? a. One sample t - test b. Paired sample t - test c. Independent sample t - test d. ANOVA e . All of the above 2. An investigation of the differences between (usually) more than two group means, for a sample measure of an attribute (variable) is called a. total variation b. variation between groups c. variation within groups d. ANOVA 3 . A NOVA use s ___________ approach, to find significant differences in the group means for a variable. a. z - statistic b. t - statistic c. p - statistic d. f - statistic e . All of the above 4. We can only run an ANOVA if the IV (grouping variable) is ___________ and DV (measured variable) on which to investigate the differences is ___________. Fill the blanks. a. Categorical and Continuous b. Continuous and Categorical c. Categorical and Categorical d. Continuous and Continuous One - way ANOVA (SPSS Output Tables for One - way ANOVA) Descriptives prices N Mean Std. Deviation Std. Error 95% Confidence Interval for Mean Minimum Maximum Lower Bound Upper Bound 0 - 10 18 3.89 .832 .196 3.47 4.30 3 5 11 - 15 45 3.96 .824 .123 3.71 4.20 1 5 16 - 25 38 3.63 1.076 .175 3.28 3.99 2 5 26 - 30 15 3.27 1.223 .316 2.59 3.94 1 5 31 or more 4 2.50 .577 .289 1.58 3.42 2 3 Total 120 3.71 .999 .091 3.53 3.89 1 5 ANOVA prices Sum of Squares df Mean Square F Sig. Between Groups 12.327 4 3.082 3.329 .013 Within Groups 106.464 115 .926 Total 118.792 119 Post Hoc Tests Homogeneous Subsets prices Duncan Spend on dinner N Subset for alpha = 0.05 1 2 31 or more 4 2.50 26 - 30 15 3.27 3.27 16 - 25 38 3.63 0 - 10 18 3.89 11 - 15 45 3.96 Sig. .055 .114 Means for groups in homogeneous subsets are displayed. a. Uses Harmonic Mean Sample Size = 11.883. b. The group sizes are unequal. The harmonic mean of the group sizes is used. Type I error levels are not guaranteed. 5. What are the degrees of freedom (df) for “between the groups” and “within the groups”, respectively in the ANOVA table ? a. 115 and 119 b. 4 and 115