ORMS 3310 Module 2

Defects 1 2 4 4 5 5 6 7 9 9 12 12 15 17 20 21 23 23 25 26 27 27 28 29 29 Referring to Scenario 2-11, if a frequency distribution for the defects data is constructed, using "0 but less than 5" as the first class, the relative frequency of the "15 but less than 20"class would be ________.

0.08 or 8% or 2/25

Defects 1 2 4 4 5 5 6 7 9 9 12 12 15 17 20 21 23 23 25 26 27 27 28 29 29 Referring to Scenario 2-11, if a frequency distribution for the defects data is constructed, using "0 but less than 5" as the first class, the frequency of the "20 but less than 25" class would be ________.

4

Time (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 Scenario 2-5, what is the cumulative relative frequency for the percentage of calls that lasted 10 minutes or more? (15+.10+.07+.07+.02)

A) .41

At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer. X: 1, 2, 3, 4, 5 f: 7, 5, 11, 8, 9 Referring to Scenario 2-2, across all of the regional offices, how many total employees were supervised by those surveyed? (1x7)+(2x5)+(3x11)+(4x8)+(5x9)

A) 127

Time (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 Scenario 2-5, if 100 calls were randomly sampled, how many calls lasted 15 minutes or longer? (100x(.10+.07+.07+.02))

A) 26

Time (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 Scenario 2-5, if 1,000 calls were randomly sampled, how many calls lasted under 10 minutes? (1000x(.37+.22))

A) 590

Time (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 Scenario 2-5, if 100 calls were sampled, ________ of them would have lasted less than 15 minutes. (100x(.37+.22+.15)

A) 74

A professor of economics at a small Texas university wanted to determine what year in school students were taking his tough economics course. Shown below is a pie chart of the results. What percentage of the class took the course prior to reaching their senior year? 10%+46%+30%

A) 86%

You have collected information on the consumption by the 15 largest coffee-consuming nations. Which of the following is the best for presenting the shares of the consumption?

A) A Pareto chart

You have collected information on the market share of 5 different search engines used by U.S. Internet users in a particular quarter. Which of the following is the best for presenting the information?

A) A Pie chart

Time (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 Scenario 2-5, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes? (.37+.22+.15+.10)

B) .84

Time (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 Scenario 2-5, if 100 calls were randomly sampled, ________ of them would have lasted at least 15 minutes but less than 20 minutes. (100x.10)

B) 10

Time (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 Scenario 2-5, if 100 calls were sampled, ________ of them would have lasted less than 5 minutes or at least 30 minutes or more. (100x(.37+.02)

B) 39

A survey of 150 executives were asked what they think is the most common mistake candidates make during job interviews. Six different mistakes were given. Which of the following is the best for presenting the information?

B) A Bar chart

Data on 1,500 students' height were collected at a larger university in the East Coast. Which of the following is the best chart for presenting the information?

B) A histogram

A type of vertical bar chart in which the categories are plotted in the descending rank order of the magnitude of their frequencies is called a

B) Pareto chart

When polygons or histograms are constructed, which axis must show the true zero or "origin"?

B) The vertical axis

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. X: 1, 2, 3, 4, 5 f: 14, 18, 12, 5, 1 Referring to Scenario 2-1, how many total claims are represented in the sample? (1x14)+(18x2)+(3x12)+(5x4)+(5x1)

C) 111

Time (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 Scenario 2-5, if 100 calls were sampled, ________ of them would have lasted 20 minutes or more. (100x(.07+.07+.02))

C) 16

Time (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 Scenario 2-5, if 10 calls lasted 30 minutes or more, how many calls lasted less than 5 minutes? (10/.02)=500 500x.37=185

C) 185

At a meeting of information systems officers for regional offices of a national company, a survey was taken to determine the number of employees the officers supervise in the operation of their departments, where X is the number of employees overseen by each information systems officer. X: 1, 2, 3, 4, 5 f: 7, 5, 11, 8, 9 Referring to Scenario 2-2, how many regional offices are represented in the survey results? (7+5+11+8+9)

C) 40

Time (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 Scenario 2-5, what is the width of each class?

C) 5 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. X: 1, 2, 3, 4, 5 f: 14, 18, 12, 5, 1 Referring to Scenario 2-1, how many drivers are represented in the sample? (14+18+12+5+1)

C) 50

Which of the following is appropriate for displaying data collected on the different brands of cars students at a major university drive?

C) A Pareto chart

Data on the number of part-time hours students at a public university worked in a week were collected. Which of the following is the best chart for presenting the information?

C) A percentage polygon

The width of each bar in a histogram corresponds to the

C) differences between the boundaries of the class.

When constructing charts, the following is plotted at the class midpoints:

C) percentage polygons.

Retailers are always interested in determining why a customer selected their store to make a purchase sporting goods retailer conducted a customer survey to determine why its customers shopped at the store. The results are shown in the bar chart below. What proportion of the customers responded that they shopped at the store because of the merchandise or the convenience? 50%+15%

D) 65%

The point halfway between the boundaries of each class interval in a grouped frequency distribution is called the ________.

class midpoint

A ________ is a vertical bar chart in which the rectangular bars are constructed at the boundaries of each class interval.

histogram

In constructing a polygon, each class grouping is represented by its ________ and then these are consecutively connected to one another.

midpoint