Chapter2

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(单选题, 1.0 分)

The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

（含图）

What is the cumulative relative frequency for the percentage of calls that lasted 10 minutes or more?

(单选题, 1.0 分)

The following are

The duration in minutes of a sample of long-distance phone calls made within

The continental United States reported by one long-distance carrier.

（含图）

If 100 calls were randomly sampled, ________ of them would have lasted at least 15 minutes but Less than 20 minutes

(单选题, 1.0 分) 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?

(单选题, 1.0 分) 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?

(单选题, 1.0 分)

The following are

The duration in minutes of a sample of long-distance phone calls made within

The continental United States reported by one long-distance carrier.

（含图）

If 100 calls were sampled, ________ of them would have lasted 20 minutes or more.

(单选题, 1.0 分) 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 good quality). The stem-and-leaf display of the data is shown below.

（含图）

What percentage of the respondents rated overall television quality with a rating from 50 through 75?

(单选题, 1.0 分) Which of the four methods of datacollection is involved when a person counts the number of cars passing designated locations on the Los Angeles freeway system?

(单选题, 1.0 分)

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.

（含图）

Across all of the regional offices, how many total employees were supervised by those surveyed?

(单选题, 1.0 分) When constructing charts, the Following is plotted at the class midpoints:

(单选题, 1.0 分) Data on the number of credit hours Of 20,000 students at a public university enrolled in a spring semester were collected. Which of the following is the best for presenting the information?

(单选题, 1.0 分) 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?

(单选题, 1.0 分)

The following are

The duration in minutes of a sample of long-distance phone calls made within

The continental United States reported by one long-distance carrier.

（含图）

What is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

(单选题, 1.0 分) When studying the simultaneous responses To two categorical questions, you should set up a

(单选题, 1.0 分) You have collected information on The market share of five different search engines used by U.S. Internet users In January 2011. Which of the following is the best for presenting the Information?

(单选题, 1.0 分)

The following are

The duration in minutes of a sample of long-distance phone calls made within

The continental United States reported by one long-distance carrier.

（含图）

If 100 calls were randomly sampled, how many calls lasted 15 minutes or longer?

（含图）

What percentage of the respondents rated overall television quality with a rating of 80 or above?

(单选题, 1.0 分) 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 three years, with the following results.

（含图）

How many total claims are represented in the sample?

(单选题, 1.0 分) In a survey, 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?

(单选题, 1.0 分)

The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.

（含图）

If 100 calls were sampled, ________ of them would have lasted less than 5 minutes or at least 30 minutes or more.

(单选题, 1.0 分)

The following are

The duration in minutes of a sample of long-distance phone calls made within

The continental United States reported by one long-distance carrier.

（含图）

If 100 calls were sampled, ________ of them would have lasted less than 15 minutes.

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