Zhen took four courses one year, and received the following grades: Credit Hours Letter Grade Course 1 5 D Course 2 2 At Course 3 6 C Course 4 3 B+ 12 What is Zhen's GPA for the year? 14 15 2.36 17 18 2.75 2.47 20 21 2.28 23 24 2.59 26 27 Question 3 (1 point) We take a sample of students who have taken a chemistry course and a geography 29 30 course. The correlation between their percentage grade X in the chemistry course and their percentage grade Y in the geography course is calculated to be 0.78. Suppose we switched the roles of the two variables, i.e., suppose we labeled chemistry grade as Y and geography grade as X. What would be the correlation between the variables? SHIFTQuestion 4 (1 point) Which of the following statements about sampling is/are true? (1) A simple random sample is the only type of sample in which every group of n 6 individuals has the same chance to be selected. (11) In a stratified sample, we must select the same sample size from each stratum. (Ill) Although there is bias involved in a convenience sample, the results will be 9 reliable as long as the sample size is high. OIll only 12 Ol only 15 Oil only Ol and ll only 17 18 Onone 20 21 Question 5 (1 point) 23 24 Consider the following cartoon: THE WIZARD OF ID 26 27 parker and hart HOW WOULD YOU RATE THE WOULD YOU SAY KING'S JOB PERFORMANCE? HE'S DOING A I THINK I KNOW WHO IS GOOD JOB, AN PAYING FOR THIS POLL 29 OUTSTANDING 30 JOB OR A TERRIFIC JOB ? OPINION POLL TAKKEQuestion 3 (1 point) We take a sample of students who have taken a chemistry course and a geography course. The correlation between their percentage grade X in the chemistry course and their percentage grade Y in the geography course is calculated to be 0.78. 9 Suppose we switched the roles of the two variables, i.e., suppose we labeled chemistry grade as Y and geography grade as X. What would be the correlation between the variables? 12 -0.78 15 0.78 18 0.87 impossible to determine with the information given 20 21 O-0.87 23 24 Question 4 (1 point) 26 27 Which of the following statements about sampling is/are true? (1) A simple random sample is the only type of sample in which every group of n individuals has the same chance to be selected. 29 30 -- (11) In a stratified sample, we must select the same sample size from each stratum. (Ill) Although there is bias involved in a convenience sample, the results will be reliable as long as the sample size is high. OIll only LonlyQuestion 1 (1 point) The five number summary for some data set is: 38 50 63 80 114 Which of the following statements is true? The distribution is skewed to the left and there is at least one outlier in the data set. The distribution is skewed to the left and there are no outliers in the data set. 12 The distribution is skewed to the right and there is at least one outlier in the data set. 15 The distribution is skewed to the right and there are no outliers in the data set. The distribution is approximately symmetric and there are no outliers in the data 18 set. 21 Question 2 (1 point) The University of Manitoba uses a grade point system with a maximum possible 24 Grade Point Average of 4.5. For each course, a student is awarded the following number of grade points per credit hour for each of the possible letter grades: Letter Grade 26 27 Grade Points A+ 4.5 A 4.0 29 30 B+ 3.5 B 3.0 C + 2.5 C 2.0 D 1.0 F 0.0 SHIPQuestion 2 (1 point) The University of Manitoba uses a grade point system with a maximum possible Grade Point Average of 4.5. For each course, a student is awarded the following number of grade points per credit hour for each of the possible letter grades: Letter Grade Grade Points 9 At 4.5 A 4.0 B+ 3.5 12 B 3.0 C+ 2.5 C 2.0 15 D 1.0 F 0.0 18 Zhen took four courses one year, and received the following grades: 20 21 Credit Hours Letter Grade Course 1 5 D 23 24 Course 2 2 A + Course 3 6 C Course 4 3 B+ 26 27 What is Zhen's GPA for the year? 29 30 2.36 2.75 2.47 CAPS SHIFT