The width of each bar in a histogram corresponds to

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2.The width of each bar in a histogram corresponds to thea)differences between the boundaries of the class.b)number of observations in each class.c)midpoint of each class.d)percentage of observations in each class.
TABLE 2-3Every spring semester, the School of Business coordinates with local business leaders a luncheon forgraduating seniors, their families, and friends. Corporate sponsorship pays for the lunches of each of theseniors, but students have to purchase tickets to cover the cost of lunches served to guests they bring withthem. The following histogram represents the attendance at the senior luncheon, whereXis the number ofguests each graduating senior invited to the luncheon andfis the number of graduating seniors in eachcategory.
17152851830020406080100120140160012345Guests per Student3.Referring to the histogram from Table 2-3, how many graduating seniors attended the luncheon?
A survey was conducted to determine how people rated the quality of programming available on television.Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely goodquality). The stem-and-leaf display of the data is shown below.StemLeaves324403478999501123456125667018924.Referring to Table 2-4, what percentage of the respondents rated overall television quality with a ratingof 80 or above?
The following are the durations in minutes of a sample of long-distance phone calls made within thecontinental United States reported by one long-distance carrier.RelativeTime (in Minutes)Frequency0 but less than50.375 but less than 100.2210 but less than 150.1515 but less than 200.1020 but less than 250.0725 but less than 300.0730 or more0.025.Referring to Table 2-5, what is the width of each class?
6.Referring to Table 2-5, if 10 calls lasted 30 minutes or more, how many calls lasted less than 5minutes?a)10

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Term
Spring
Professor
Nguyen Manh The