QRB 501 WEEK 3 PRACTICE QUIZ STUDY GUIDE
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1. Sales by each salesperson at a certain shop Salesperson MON. T UES. WED. THURS. FR I. SAT. Total Brown off $106.54 $114.52 $258.94 $143.63 $165.48 $789.11 Jackson $289.36 off $226.16 off $162.84 off $678.36 Ulster $280.61 $195.37 $154.52 $226.19 $116.78 off $973.47 Young off $122.90 off $181.25 off $296.17 $600.32 Totals $569.97 $424.81 $495.20 $666.38 $423.25 $461.65 $3041.26
What day of the week at the highest amount and sales? What they had the lowest amount and sales? 2. Sales by each salesperson at a certain shop Salesperson MON. T UES. WED. THURS. FR I. SAT. Total Brown Off $204.35 $114.52 $111.64 $224.35 $225.82 $880.68 Jackson $267.14 Off $151.91 Off $198.41 Off $617.46 Ulster $163.03 $229.74 $179.33 $223.89 $116.78 Off $912.77 Young Off $122.90 Off $181.25 Off $296.17 $600.32 Totals $430.17 $556.99 $445.76 $516.78 $539.54 $521.99 $3011.23 Using the information in the table, construct a bar graph showing total sales by salesperson for the shop. What bargraph is correct? A – Brown; B – Jackson; C – Ulster; D – Young 3. Using the bargraph to the right to determine the answer which quarter had the highest dollar volume? a. July – September b. January – March c. April – June d. October – December 4. Use the line graph to the right to determine what speed gave the highest gasoline mileage for both types of automobiles. 5. Use the line graph to the right to determine at what 10 mph increment the driver would first notice a decrease in gasoline mileage. Which car showed this decrease? 6. The family budget is illustrated in the figure to the right. What is the total take-home pay and what percent is allocated for transportation? 7. Match the dollar values with the names in the circle graph: $193, $130, $84, $61, $61. a. Chevez – $61, Young – $193, Chow – $130, Santoni – $61, Wilson – $84 b. Chevez – $130, Young – $61, Chow – $61, Santoni – $193, Wilson – $84 c. Chevez – $193, Young – $61, Chow – $61, Santoni – $130, Wilson – $84 d. Chevez – $193, Young – $61, Chow – $130, Santoni – $61, Wilson – $130 8. using the line graph to the right, calculate the amount in percent of increase in the employee’s salary from 2005 to 2006.
9. Use the line graph to the right to determine the following. If the cost of living increase was 10% from 2002 to 2008, determine if the employee’s salary for this period of time kept pace with inflation. Did the employee’s salary for this period of time keep pace with inflation? 10. find the mean for the scores: 3,840; 5,400; 8,540; 4,300; 5,350. 11. Find the median for the scores: 91, 68, 71, 86, 71, 95, 88, 74, 71, 89, 89, 96, 74, 75. 12. find the mode for the scores: 4,400; 5,600; 8,550; 4,400; 5,650. 13. Weekly expenses of students taking a business mathematics class are shown in the table on the right. 89 37 78 154 66 86 92 80 52 75 86 98 88 90 86 97 100 97 79 96 58 78 81 84 104 77 a. Find the mean b. find the median c. find the mode 14. The grades earned by students on a midterm business math exam are shown on the right. Make a frequency distribution of the data using the intervals 61 – 69, 71 – 79, 80 – 89, and 90 – 99. 78 83 63 87 94 81 91 72 84 87 98 93 85 68 91 78 86 91 83 92 Fill out the grouped frequency distribution. 15. In the table on the right there are grades that were earned by students on a midterm business math exam. What percent of the students earned a grade below 80? 78 89 62 87 94 81 91 76 87 82 96 97 84 60 99 73 83 92 86 94 16. Find the range for the set of data: 21, 28, 14, 19, 19. 17. Find the deviations from the mean for the set of data: 26, 33, 18, 24, 24. 18. Find the sum of squares of the deviations from the mean of a series of ACT scores listed below. 14, 17, 30, 28, 21 19. Find the variance for the set of data: 21, 28, 13, 19, 19. 20. In a set of 110 AC T scores, where the mean is 20 and the standard deviation is 4.69, (a) how many scores are expected to be lower than 15.31 (one standard deviation below the mean)?
(b) How many of the 110 scores are expected to be below 29.38 (to standard deviations above the mean)?