Question 1 A class of eight students has SAT scores of 1112, 1168, 1210, 1300, 919, 825, 1210, 917. What is the average SAT score? Were there any students who received the same score? If so, what were the scores? What was the range of scores? How much do the scores vary from the average SAT score? Question 2 What type of data do experiments gather? Question 3 How is direct observation different from secondary data collection? Question 4 The following data shows the median weekly earnings of full-time workers by gender over a five-year period: Year Men Women 2004 $713 $573 2005 $722 $585 2006 $743 $600 2007 $766 $614 2008 $798 $638 Justify why the data in the table show is cross-sectional. Give examples that support your answer. Question 5 What is the difference between continuous data and discrete data? Question 6 What is a Pareto chart and how is it used in business? Question 7 Which statistical measurement is most affected by outliers in a data set? Give examples. Question 8 A Scottrade survey in January 2011 asked adults how much money they have saved for retirement. The data is shown in the table below: How Much Percentage Less than $25,000 39% $25,001 to $100,000 14% $100,001 to $250,000 9% $250,001 to $500,000 7% More than $500,000 7% Not sure 24% Examine the data table to determine the best way (Pareto chart, pie chart or bar chart) to display this data and why. Question 9 The following data set shows the closing value of the S&P 500 stock market index for the months of July 2008 through October 2009: {1264, 1296, 1164, 953, 889, 891, 846, 730, 791, 877, 923, 919, 976, 1020, 1057, 1036} After evaluating the data, which answer gives the mean, the standard deviation ,and the coefficient of variation of the data above (in the order mentioned)? Select one: a. 977, 158.2, 16.1 b. 158.2, 16.1, 977 c. 977, 16.1, 158.2 d. 158.2, 977, 16.1 Question 10 Why can’t you depend on using the range of a large data set? Question 11 The Olive Garden Italian Restaurant records the amount of time customers wait for a table on Saturday evenings. The following table lists the frequency of wait times for the last 100 customers. Number of Minutes Per Customer Frequency 0 to under 10 6 10 to under 20 22 20 to under 30 10 30 to under 40 18 40 to under 50 28 50 to under 60 16 Analyze the data to determine the approximate average wait time and the standard deviation of the wait time per customer. Question 12 The following data set represents the battery life, in minutes, on a single charges for 25 iPads. image Which statement best describes the five-point summary for the data? Select one: a. 215, 240, 271, 290, 330 b. 365, 240, 125, 176, 300 c. 470, 309, 290, 188, 100 d. 256, 310, 339, 248, 381