CHSPE Data Analysis 4

Question 1

A line of best fit on a scatter plot is used to:

Accepted Answer

Predict values and show trends in the data

Answer

Connect every data point exactly

Answer

Show the exact relationship between variables

Answer

Display the mode of a data set

Question 2

The range of the data set {12, 15, 18, 22, 30} is:

Accepted Answer

18

Answer

12

Answer

22

Answer

30

Question 3

Which sampling method gives every member of a population an equal chance of being selected?

Accepted Answer

Random sampling

Answer

Convenience sampling

Answer

Voluntary response sampling

Answer

Stratified sampling

Question 4

A bar graph shows monthly rainfall. June had 3 inches, July had 5 inches, August had 4 inches. What was the average monthly rainfall for those three months?

Accepted Answer

4 inches

Answer

3 inches

Answer

5 inches

Answer

12 inches

Question 5

In a data set, an outlier is BEST described as:

Accepted Answer

A value far from the rest of the data

Answer

The most common value

Answer

The middle value when sorted

Answer

The difference between highest and lowest

Question 6

A frequency table shows: Score 70 (5 students), 80 (8 students), 90 (7 students). How many students scored above 75?

Accepted Answer

15

Answer

5

Answer

8

Answer

13

Question 7

A student rolls a number cube (1–6) twice. What is the probability of rolling a 3 both times?

Accepted Answer

1/36

Answer

1/6

Answer

1/12

Answer

2/6