STAT 200 ALL QUIZZES BUNDLE

1. Click the following link Get Data to open a Minitab data set. From this data, use Minitab to answer the following: 1. The mean of the variable Height in column C6 2. The Interquartile Range (IQR) of the variable GPA in column C2. 3. Describe the shape of the variable CellTime in column C5 A) Mean = 67.072; IQR = 0.60; Skewed right B) Mean = 67.072; IQR = 0.60; Skewed left C) Mean = 67.508; IQR = 0.64; Skewed right D) Mean = 67.207; IQR = 0.6325; Skewed right Feedback: To find the mean: go either to Stat > Basic Statistics > Display Descriptive Statistics and selecting Height, or going to Calc > Column Statistics > select the option Mean and select Height. For IQR, first find Q1 and Q3 by going to Stat > Basic Statistics > Display Descriptive Statistics and selecting GPA. From this, IQR is found by Q3 - Q1. To describe the shape, create a histogram [Graph > Histogram > select CellTime] and notice that the bulk of the data gathers to the left and "tails" tails to the right. So the shape would be described as skewed right or positively skewed. Points Earned: 3.0/3.0 Correct Answer(s): A 2. Close all minitab files Click the following link Get Data to open a new Minitab data set. From this data, use Minitab to answer the following: 1. How many students answered the question regarding SAT Math scores (Column C14)? 2. Which Gender reported having the higher mean GPA (column C2)? A) Answered = 242; Higher Mean GPA = Male; B) Answered = 242; Higher Mean GPA = Female; C) Answered = 250; Higher Mean GPA = Female; D) Answered = 250; Higher Mean GPA = Male; Feedback: Number who answered is 242. There were 8 students who did not answer this qestion - N*. For question 2, This can be found by going to Stat > Basic Statistics > Display Descriptive Statistics and selecting GPA for the variables box and Gender for the By Variable box. The results show that females have the higher mean. Points Earned: 2.0/2.0 Correct Answer(s): B 3. In a study of patients who had a heart attack, 3630 patients were randomly assigned to receive one of three treatments: aspirin alone, warfarin alone, or aspirin plus warfarin. The results showed that 20.0% of the aspirin group had another heart attack, stroke, or died, compared with 16.7% of the warfarin group and 15.0% of the aspirin plus warfarin group. The difference between the aspirin and warfarin groups was statistically significant, while the difference between the warfarin and aspirin plus warfarin group was not statistically significant. The statistically significant difference between the aspirin group (20.0%) and the warfarin group (16.7%) means that A) the difference between the