math 225n week 4 quiz

Question 1 1/1 points Alice sells boxes of candy at the baseball game and wants to know the mean number of boxes she sells. The numbers for the games so far are listed below. 16,14,14,21,15 Find the mean boxes sold. That is correct! mean= 16 boxes$$ mean= 16 boxes - correct Answer Explanation Correct answers: Remember that the mean is the sum of the numbers divided by the number of numbers. There are 5numbers in the list. So we find that the mean boxes sold is Question 2 1/1 points Given the following list of prices (in thousands of dollars) of randomly selected trucks at a car dealership, find the median. 20,46,19,14,42,26,33 That is correct! median= 26 thousands of dollars$$ median= 26 thousands of dollars - correct Answer Explanation Correct answers: • • • • Question 3 · 1/1 points Each person in a group shuffles a deck of cards and keeps selecting a card until a queen appears. Find the mode of the following number of cards drawn from a deck until a queen appears. 3,12,3,11,5,5,3,10,12 That is correct! mode= 3 cards$$ mode= 3 cards - correct Answer Explanation Correct answers: • mode= 3 cards $text{mode=}3text{ cards}$ • If we count the number of times each value appears in the list, we get the following frequency table: Value Frequency 3 3 5 2 10 1 11 1 12 2 Note that 3occurs 3times, which is the greatest frequency, so 3is the mode of the number of cards drawn from a deck until a queen appears. • • • • Question 4 · 1/1 points The dataset below represents bugs found by a software tester in her product during different phases of testing: 88, 84, 81, 94, 91, 98, 98, 200. The measures of central tendency are given below: Mean: 104.25; Median: 92.5; Mode: 98. Identify the outlier and the measure of central tendency that is affected by the outlier. That is correct! The outlier is 98. The mode is affected by the outlier. The outlier is 98. The mean is affected by the outlier. The outlier is 200. The median is affected by the outlier. The outlier is 200. The mean is affected by the outlier. Answer Explanation Correct answer: The the rest. In this case, the mean of 104.25would not be a good measure of the center of the dataset since 7of the 8data values are less than 104.25. • • • • Question 5 · 1/1 points Given the following histogram, decide if the data is skewed or symmetrical. A bar graph has a horizontal axis titled Values labeled from 2 to 18 in increments of 2 and a vertical axis titled Frequency labeled from 0 to 200 in increments of 50. 14 bars are plotted, above the numbers 2 to 16. From left to right, the heights of the bars are as follows: 1. 5. 10. 40, 75, 125, 190, 180, 130, 125, 60, 25,20, 10. All values are approximate. That is correct! . • • • • Question 8 · 1/1 points The box-and-whisker plot shows the number of books read by history students during the last school year. A box and whisker plot with minimum 4, first quartile 6, median 8, third quartile 10, and maximum 15 What is the range of the data? That is correct! 11$$ 11 - correct Answer Explanation Correct answers: • Remember that the box-and-whisker plot represents the five number summary of a set of data. So the left end of the left whisker is the minimum value (4), the left edge of the box is the first quartile (6), the line in the middle of the box is the median (8), the right edge of the box is the third quartile (10), and the right end of the right whisker is the maximum value (15). The range is the difference between the maximum and the minimum value, so it is • • • • Question 9 · 1/1 points Is the statement below true or false? Independent is the property of two events in which the knowledge that one of the events occurred does not affect the chance the other occurs. ..............................................continued...................................................