As a project for his statistics class in Spring 2001, Ahmed was supposed to take a random sample of 30 cars in the student parking lot and determine the make and year of each car. (a) Ahmed used a random-number table to get a random sample of 30 cars in the parking lot. Suppose the lot is full and there are 950 parking places. Describe how he sampled the 30 cars. (b) After getting his random sample, Ahmed found that eight cars were Chaverolets, seven were Fords, five were Toyotas, three were BMWs, three were Hondas, three were Oldsmobiles, and one was a Cadillac. Make a table for these data, and draw a bar graph. Draw a circle graph showing the percentage of the total number of cars samples (c) The model years for each of the 30 cars are shown here: 96 99 95 97 86 92 96 97 89 92 83 92 99 87 89 90 90 97 93 88 93 95 84 95 76 96 88 99 95 93 Make a frequency table, histogram, and a frequency polygon for these data (use five classes). Describe the shape of the histogram.
As a project for his statistics class in Spring 2001, Ahmed was supposed to take a random sample of 30 cars in the student parking lot and determine the make and year of each car. (a) Ahmed used a random-number table to get a random sample of 30 cars in the parking lot. Suppose the lot is full and there are 950 parking places. Describe how he sampled the 30 cars. (b) After getting his random sample, Ahmed found that eight cars were Chaverolets, seven were Fords, five were Toyotas, three were BMWs, three were Hondas, three were Oldsmobiles, and one was a Cadillac. Make a table for these data, and draw a bar graph. Draw a circle graph showing the percentage of the total number of cars samples (c) The model years for each of the 30 cars are shown here: 96 99 95 97 86 92 96 97 89 92 83 92 99 87 89 90 90 97 93 88 93 95 84 95 76 96 88 99 95 93 Make a frequency table, histogram, and a frequency
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