The manager of a department store interviews every tenth customer for comments on the new store layout.

B)

A salesperson at a department store searches the Statistics Canada web site for economic data on the population living around the store.

C)

Both of these are primary sources.

D)

Neither of these is a primary source.

2

In order to determine the opinions of citizens concerning a proposed new sports complex to be built in a town, the mayor set up a desk at the local mall, and interviewed those who stopped by the desk. This kind of sampling is:

A)

Simple random sampling.

B)

Stratified random sampling.

C)

Systematic random sampling.

D)

Non-random sampling.

3

Kumar asked ten students in his class to record how much each spent on buying lunches in the school cafeteria over one month. This data is best represented using

A)

A frequency table.

B)

A bar graph.

C)

A broken-line graph.

D)

Any of these are suitable.

4

Seymour noted the price of aviation gasoline at various airports during a flight across Canada. The data are shown. Find the mean of these data (7.0K)

A)

1.12

B)

1.11

C)

1.10

D)

1.09

5

Find the median price of aviation gasoline in question 4.

A)

1.12

B)

1.11

C)

1.10

D)

1.09

6

Find the mode of the prices in question 4.

A)

1.12

B)

1.11

C)

1.10

D)

1.09

7

The data in question 4 have two outliers in the form of 1.19 and 1.20. The effect of these outliers is:

A)

The mean is lower.

B)

The mean is higher.

C)

The median is lower.

D)

The median is higher.

8

An outlier which is lower in value than the mode tends to

A)

Increase the value of the mode.

B)

Decrease the value of the mode.

C)

Have no effect on the mode.

D)

Change the mode to a different but unpredictable value.

9

The scatter plot shown relates age to the average amount of soda pop consumed per week. From this scatter plot, what relation appears evident? (16.0K)

A)

There is no relation between age and amount of soda pop consumed per week.

B)

As age increases, the amount of soda pop consumed per week decreases.

C)

As age increases, the amount of soda pop consumed per week increases.

D)

As age increases, the amount of soda pop consumed per week remains the same.

10

Nine visitors to a shopping mall were selected at random. They were asked for their yearly income, to the nearest $1000, and how many visits they had made to the mall during the year. The results are shown in the scatter plot. What relation appears evident? (19.0K)

A)

There is no relation between income and number of mall visits.

B)

As income increases, the number of mall visits increases.

C)

As income increases, the number of mall visits increases.

D)

As income increases, the number of mall visits increases.

To learn more about the book this website supports, please visit its Information Center.