Need help with homework.
| Two thousand two hundred frequent business travelers are asked which Midwestern city they prefer: Indianapolis, Saint Louis, Chicago, or Milwaukee. 124 liked Indianapolis best, 416 liked Saint Louis, 1225 liked Chicago, and the remainder preferred Milwaukee. Develop a frequency table and a relative frequency table to summarize this information. (Round relative frequency to 3 decimal places.) |
| City | Frequency | Relative Frequency |
| Indianapolis | ||
| St. Louis | ||
| Chicago | ||
| Milwaukee | ||
| A small business consultant is investigating the performance of several companies. The fourth-quarter sales for last year (in thousands of dollars) for the selected companies were: |
| Company | Fourth-Quarter Sales ($ thousands) |
| Hoden Building Products | $ 1,645.2 |
| J & R Printing Inc. | 4,757.0 |
| Long Bay Concrete Construction | 8,913.0 |
| Mancell Electric and Plumbing | 627.1 |
| Maxwell Heating and Air Conditioning | 24,612.0 |
| Mizelle Roofing & Sheet Metals | 191.9 |
| The consultant wants to include a chart in his report comparing the sales of the six companies. |
| Identify a bar chart that compares the fourth-quarter sales of these corporations. |
| The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area. The daily number of oil changes at the Oak Street outlet in the past 20 days are: |
| 65 | 98 | 55 | 62 | 79 | 59 | 51 | 90 | 72 | 56 |
| 70 | 62 | 66 | 80 | 94 | 79 | 63 | 73 | 71 | 85 |
| The data are to be organized into a frequency distribution. |
| a. | How many classes would you recommend? |
| Number of classes |
| d. | Organize the number of oil changes into a frequency distribution. (Round relative frequency answers to 2 decimal places.) |
| f | Relative frequency | |
| 50 up to 60 | ||
| up to | ||
| up to | ||
| up to | ||
| up to | ||
| Total | ||
| The food services division of Cedar River Amusement Park Inc. is studying the amount that families who visit the amusement park spend per day on food and drink. A sample of 40 families who visited the park yesterday revealed they spent the following amounts: |
| $77 | $18 | $63 | $84 | $38 | $54 | $50 | $59 | $54 | $56 | $36 | $26 | $50 | $34 | $44 |
| 41 | 58 | 58 | 53 | 51 | 62 | 43 | 52 | 53 | 63 | 62 | 62 | 65 | 61 | 52 |
| 60 | 60 | 45 | 66 | 83 | 71 | 63 | 58 | 61 | 71 |
| a. | Organize the data into a frequency distribution, using seven classes and 15 as the lower limit of the first class. What class interval did you select? (Round your answer to the nearest whole number.) |
| Class interval |
| b. | Where do the data tend to cluster? (Select all that apply.) | ||||||||||
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| Ecommerce.com, a large Internet retailer, is studying the lead time (elapsed time between when an order is placed and when it is filled) for a sample of recent orders. The lead times are reported in days. |
| Lead Time (days) | Frequency |
| 0 up to 5 | 6 |
| 5 up to 10 | 7 |
| 10 up to 15 | 12 |
| 15 up to 20 | 8 |
| 20 up to 25 | 7 |
| Total | 40 |
| a. | How many orders were studied? |
| Number of orders |
| b. | What is the midpoint of the first class? (Round your answer to 1 decimal place.) |
| Midpoint |
| c. | What are the coordinates of the first class for a frequency polygon assuming we draw a frequency polygon using the midpoints? (Round your answer to 1 decimal place.) | |||||||||||||||||||||||||||
x = , y =
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unanswered
