Exercise 1 Teachers at a school site attended a seminar on mathematical problem solving. Their attitudes were measured b

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Exercise 1 Teachers At A School Site Attended A Seminar On Mathematical Problem Solving Their Attitudes Were Measured B 1 (195.63 KiB) Viewed 132 times

Exercise 1 Teachers at a school site attended a seminar on mathematical problem solving. Their attitudes were measured before and after the seminar. A positive number change attitude indicates that a teacher's attitude toward math became more positive. A random sample of twelve teachers' change scores are as follows: 3 8 -1 25 2 0 BMW 5 series a. What is the average change score? b. Find the sample standard deviation, s, for the change score c. Find the 5# summary for this data (Min, Q1, Median, Q3, Maximum) d. What is the z-score (# of standard deviations from the mean) for the person that responded "2"? e. Construct a graph of the data (If you do this with technology, you still need to sketch your graph). f. Describe your graph. (Make sure you address all your SOCS...Shape, Outliers, Center and Spread) BMW 7 series 30 5 Exercise 2 A survey was conducted of 130 purchasers of new BMW 3 series cars, 130 purchasers of new BMW 5 series cars, and 130 purchasers of new BMW 7 series cars. In it, people were asked the age they were when they purchased their car. The following box plots display the results. BMW 3 series 35 -3 1 40 -1 6 45 5 -2 50 55 60 65 70 75 a. Compare the three box plots. What do they imply about the age of purchasing a BMW from the series when compared to each other? c. Look at the BMW 5 series. Which interval has the fewest data in it? How do you know this? i. 31-35 ii. 38-41 iii. 41-64 b. Look at the BMW 5 series. Are there more data in the interval 31-38 or in the interval 45-55? How do you know this? 80