7th Grade Statistics

Question 1

Of 1000 girls I wanted a sample of 30 girls to represent the school. Which survey would be best

Accepted Answer

Choose every third girl out of 100 randomly selected names.

Question 2

The double dot plot shows wait time in minutes. Which ride typically has a longer wait time?

Accepted Answer

Rocket Blast

Question 3

Which statistic is misleading in the following set of test scores? 2, 85, 87, 88, 89

Accepted Answer

mean

Question 4

Find the mode of 2, 85, 87, 88, 88

Accepted Answer

88

Question 5

Joe surveyed students favorite color. 18 of 48 chose red. Of 600 students how many prefer red?

Accepted Answer

225

Question 6

Which is an appropriate display to show the spread of 38 scores for Mrs. Fink’s last math test?

Accepted Answer

box-and-whisker plot

Question 7

Which statistic gives the most accurate data for the set of test scores? 2, 85, 87, 88, 89

Accepted Answer

median

Question 8

The graph shows the average price of gas for one month in Austin. Why is the graph misleading?

Accepted Answer

The intervals on the vertical axis are not equal.

Question 9

About how many points higher is the upper quartile for the NFC than the AFC?

Accepted Answer

10 points

Question 10

The manager analyzed sales for 1 month. If he orders 150 how many should be Home Productivity?

Accepted Answer

32

Question 11

A number cube is marked with numbers 1-6 on its faces. If you roll the cube once, what is P(2)?

Accepted Answer

1/6

Question 12

140 children play Baseball. See table. 1 child is picked randomly. Find P(not 9 years old)

Accepted Answer

9/35

Question 13

Find the mean of 2, 85, 87, 88, 88

Accepted Answer

70

Question 14

Find the median of 2, 85, 87, 88, 88

Accepted Answer

87

Question 15

Each week the French Club sells bagels & the Spanish Club sells donuts. Which club sells more?

Accepted Answer

Spanish Club

Question 16

A set of counters is numbered 1-12. You draw one without looking. What is P(less than 4)?

Accepted Answer

1/4

Question 17

Find the minimum of 2, 85, 87, 88, 88

Accepted Answer

2

Question 18

If 130,000,000 voters voted when this poll was taken, how many voters would vote for Johnson?

Accepted Answer

11,700,000

Question 19

Which class had a greater range of test scores?

Accepted Answer

1st period

Question 20

Jack knows 35 of 50 kids prefer chocolate milk to white. 200 kids get milk, how many are white?

Accepted Answer

60

Question 21

Which is not a reason that measures of central tendency for a set of data can be misleading?

Accepted Answer

too much data

Question 22

For which division were 75% of the points scored greater than 16 points?

Accepted Answer

AFC

Question 23

Which is an appropriate display to show the parts of a monthly budget for certain expenses?

Accepted Answer

circle graph

Question 24

If you spin the spinner shown, what is P(red or blue)?

Accepted Answer

1/2

Question 25

Which is an appropriate display to show all of the finishing times for 20 runners in a race?

Accepted Answer

bar graph

Question 26

An ordinary six-sided die is rolled. What is P(greater than four)?

Accepted Answer

1/3

Question 27

I surveyed students favorite music. Of 550 students, how many prefer Pop/Rock? See table.

Accepted Answer

264

Question 28

Find the upper quartile of 2, 85, 87, 88, 88

Accepted Answer

88

7th Grade Statistics

Questions 28

7th Grade Statistics

Questions 28