The following are the durations in minutes of a sample of long-distance phone ca
ID: 2960684 • Letter: T
Question
The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.
Table 2-5
RelativeTime (in Minutes)
Frequency
0 but less than 5
0.37
5 but less than 10
0.22
10 but less than 15
0.15
15 but less than 20
0.10
20 but less than 25
0.07
25 but less than 30
0.07
30 or more
0.02
Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?
An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance. A representative from a local insurance agency selected a random sample of insured drivers and recorded, X, the number of claims each made in the last 3 years, with the following results.
Table 2-1
X
f
1
14
2
18
3
12
4
5
5
1
Referring to Table 2-1, how many drivers are represented in the sample?
A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result.
Table 2-6
Did Well in Midterm
Did Poorly in Midterm
Studying for Exam
80
20
Went Bar Hopping
30
70
Referring to Table 2-6, if the sample is a good representation of the population, we can expect_______ percent of the students in the population to spend the weekend studying and do poorly on the midterm.
The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.
Table 2-5
RelativeTime (in Minutes)
Frequency
0 but less than 5
0.37
5 but less than 10
0.22
10 but less than 15
0.15
15 but less than 20
0.10
20 but less than 25
0.07
25 but less than 30
0.07
30 or more
0.02
Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?
0.10 0.59 0.76 0.84 The following are the durations in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes? An insurance company evaluates many numerical variables about a person before deciding on an appropriate rate for automobile insurance. A representative from a local insurance agency selected a random sample of insured drivers and recorded, X, the number of claims each made in the last 3 years, with the following results. Referring to Table 2-1, how many drivers are represented in the sample? A sample of 200 students at a Big-Ten university was taken after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following table contains the result. Referring to Table 2-6, if the sample is a good representation of the population, we can expect percent of the students in the population to spend the weekend studying and do poorly on the midterm. You form by dividing the frequencies in each class of the frequency distribution by the total number of observations. A is a bar chart for grouped numerical data in which the frequencies or percentages of each group is represented by an individual bar.Explanation / Answer
(11) 0.37+0.22+0.15+0.1 =0.84
(12)14+18+12+5+1 =50
(13)20/(80+30+20+70) =10%
(14)relative frequency distribution
(15)histogram
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