WGU C955 - Module 4 Descriptive Statistics for a Single Variable Exam Questions With Correct Answers

If 200 people are surveyed, how many claim to have had no exercise? {{ Pie chart reflecting the average number of hours exercised per week. No exercise 36%, 1 - 2 hours 28%, 3 - 4 hours 12%, 4 - 5 hours 10%, 5 - 6 hours 8%, 6 - 7 hours 4%, more than 7 hours 2%. }} a 18 b 36 c 72 d Cannot determine - Answer 72 Determine the range for the following data set. {1,24,26,28,32,36,38,40,65} a 1 to 65 b 64 c 65 d Cannot determine - Answer 64 It is important to start the frequency scale on a bar chart at which value to be certain not to overemphasize a difference in values? a Zero b The lowest measured value c The smallest frequency d As long as the scale is even, it doesn't matter where you start it. - Answer Zero If 80 people exercised 4 - 5 hours per week, how many people were surveyed? {{ Pie chart reflecting the average number of hours exercised per week. No exercise 36%, 1 - 2 hours 28%, 3 - 4 hours 12%, 4 - 5 hours 10%, 5 - 6 hours 8%, 6 - 7 hours 4%, more than 7 hours 2%. }} a 80 b 800 c 400 d 50 - Answer 800 You are a professional trainer at a local sports academy. You ask your athletes to determine the number of grams of protein they consume for a particular meal. Which of the following would be the best choice to illustrate the shape of the data you collect? a Bar chart b Pie chart c Box plot d None of the above - Answer Box plot What is the most significant difference between histograms and bar charts? a The number of bars used b The use of labels on the axes c The type of data depicted in the graph d The coloring used for each bar - Answer The type of data depicted in the graph Of the following sets of data, which would you assume should have the greatest range? a Age when a baby gets their first tooth b Age of first-year business students c Age of death d Age of high school graduate - Answer Age of death Determine any outliers in the following data set. {1,24,26,28,32,36,38,40,65} a 1 b 65 c A and B d None - Answer A and B Determine the interquartile range ( IQR ) for the following set of diagnostic test scores. {60,47,65,85,81,77,70,56,47,84,75} a 25 b 57 c 68 d 80 - Answer 25 Stem plots display which type of data? a Quantitative b Categorical c Neither Quantitative nor categorical d Quantitative and categorical - Answer Quantitative Determine the median for the following set of diagnostic test scores.{60,47,65,85,81,77,70,56,47,84,75} a 67 b 70 c 47 d 67.9 - Answer 70 Determine Q3 for the sorted list of data values. {3,8,8,10,16,20,20,23,27,37,44,45,62,71} a 27 b 37 c 44 d 45 - Answer 44 The bitrate of audio files in a sample group of files ranged from 160 kilobytes per second (Kbps) to 256 kilobytes per second (Kbps). What percentage of the audio files will fall within 2 standard deviations of the mean? Assume the data is normally distributed. a 34% b 68% c 95% d 99.7% - Answer 95% Which of the following are best used to display categorical data? a Histogram b Dot plot c Pie chart d Stem plot - Answer Pie chart When observing a box plot, what percentage of the measured data lies between Q1 and the maximum value in the list? a 75% b 50% c 25% d Cannot determine. - Answer 75% Which of the four different sets of numbers would have the greatest standard deviation? a 5,5,5,5,5 b 5,6,7,8,9 c 1,8,16,25,33 d 40,43,45,47 - Answer 1,8,16,25,33 Determine the best estimate for the total number of ice creams sold on Monday and Tuesday. {{ Bar Chart reflecting the average number of ice creams sold on each day of the week. Mon. 70, Tue. between 60 and 70, Wed. between 50 and 60, Thur. between 40 and 50, Fri. between 60 and 70, Sat between 30 and 40, Sun. 30. }} a 100 b 112 c 137 d 148 - Answer 137 Please use the dot plot below to answer the following question. Dot Plot displaying the following data points: 5, 6, 6, 7, 8, 8, 8, 9, 9, 10. Determine the median for the data. a 7 b 7.5 c 8 d Cannot determine. - Answer 8 The return on investment (ROI) in a sample population of investments ranged from 8% to 23% . What percentage of the sample will fall within 1 standard deviation above the mean? Assume the data is normally distributed. a 47.5% b 13.5% c 68% d 34% - Answer 34% Arrange the mean, median, and mode in order from least to greatest in a distribution that it is positively skewed. a Median, mode, mean b Mean, median, mode c Mean, mode, median d Mode, median, mean - Answer Mode, median, mean If the following data are represented on a stem plot, how many leaves would be shown on the " 6 " stem? {57,63,55,59,52,60,65,56,56,65,55,63} a 5 b 4 c 3 d 2 - Answer 5