Stat Midterm Chapter 1

Use Scenario 1-3. The median point total for this class is

B. 130.5.

Use Scenario 1-2. The percent of cars with 4-cylinder engines that are made in Germany is

B. 21%.

Mr. Williams asked the 26 seniors... Use Scenario 1-4. The median number of A.P. courses taken by Mr. Williams's students is

B. 3

The mean age of four people in a room is 30 years. A new person whose age is 55 years enters the room. The mean age of the five people now in the room is

B. 35.

Use Scenario 1-4. Which of the following is a correct box plot for these data?

B. B

Use Scenario 1-1. The proportion of registered Democrats that are male is

C. 0.33

You measure the age (years), weight (pounds), and marital status (single, married, divorced, or widowed). of 1400 women. How many variables did you measure?

C. 3

Below is a two-way table summarizing the number of cylinders.... Use Scenario 1-2. The percentage of all cars listed in the table with 4-cylinder engines is

C. 50%.

You open a package of plain M & M candies and count how many there are of each color. The distribution of the variable "candy color" is:

C. Six—the number of different colors the are in the package.

The histogram below show the length (in minutes) of 140 songs...

C. Skewed right, centered at about 4.5, with several high outliers.

An office supply catalog gives a description of bookshelves that includes the following variables. Which of these variables is categorical?

C. The color of the bookshelf

Use Scenario 1-1. Your percentage from question number 14 is part of

C. The conditional distribution of gender among Democrats.

A set of data has a mean that is much larger than the median. Which of the following statements is most consistent with this information?

C. The distribution is skewed right.

Use Scenario 1-2. Which of the following is a marginal distribution?

C. The percentage of all cars manufactured in each country.

A sample was taken of the salaries of 20 employees.... Use Scenario 1-5. Based on the boxplot, which of the following statements is true?

C. The range of the middle half of the salaries is about $20,000.

X and Y are two categorical variables. The best way to determine if there is a relation between them is to

C. make a two-way table of the X and Y values.

A review of voter registration records in a small town... Use Scenario 1-1. The proportion of males that are registered as Democrats is

D. 0.30

Use Scenario 1-3. To which of the following data sets does this stemplot correspond?

D. 116, 118, 121, 124, 128, 133, 137, 142, 146, 179

The following histogram represents the distribution of acceptance rates among 25 business schools.... What percent of the schools have an acceptance rate of under 20%?

D. 16%

Use Scenario 1-4. The interquartile range for the number of A.P. Courses is

D. 2

. A sample of production records for an automobile manufacturer shows the following figures for production per shift: 705 700 690 705 The variance of the sample is

D. 50.00.

Based on this histogram, the percentage of the winning jumps that were at least 80 inches is about

D. 55%.

Use Figure 1-1. The mean of this histogram is approximately

D. 82 inches.

Use Scenario 1-1 Your percentage from question number 12 is part of

D. The conditional distribution of political party registration among males.

Use Scenario 1-5. Based on the boxplot, the five-number summary is

A. 28, 39, 48, 60.5, 77.

A survey typically records many variables of interest to the researchers involved. Below are some of the variables from a survey conducted by the U.S. Postal Service. Which of the variables is categorical?

A. County of residence

The ages of people in a college class are as follows: The ages of people in a college class are as follows:

A. It must be 20.

For a physics course containing 10 students.... Use Scenario 1-3. This stem plot is most similar to

A. a histogram with class intervals 110 (less than/equal to) score < 120, 120 (less than/equal to) score < 130, etc.

Use Scenario 1-2. From this table, we might conclude that

A. there is a strong association between country of origin and number of cylinders.

You measure the age, marital status and earned income of an SRS of 1463 women. The number and type of variables you have measured is

E. three; one categorical and two quantitative.