Probability Statistics Pre-Test

Gabe took a survey of students in his school to see how many have a pet. He surveyed 48 students, and 30 said they have a pet. Based on Gabe’s survey, if there are 600 students in his school, he might expect ____ of them to have a pet.

• 375

• 96

• 160

• 348

Morgan rolled a number cube 20 times.  The cube landed on the number 6 five times.  What is the experimental probability that Morgan will roll a number 6 the next time she rolls the number cube?

• 3/10

• 1/4

• 1/6

• 1/5

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

Gabby conducted an experiment with a spinner.  Based on this data, how many times can she expect to spin a 2 in the next 25 spins?

• 24

• 6

• 12

• 14

Tags

CCSS.6.SP.A.1

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

A survey asked middle school students which of four intermural sports they would most like to have at their school.  What is the size of the sample?

• 90

• 16

• 34

• 80

Tags

CCSS.6.SP.B.5

If you flip a coin, what are the odds that it will land on heads?

• 50%

• 100%

• 35%

If you flip a coin 100 times and it lands on heads each time; what are the odds it will land on heads for the next flip?

• 100%

• 75%

• 25%

• 50%

What does "mean" mean?

• average

• middle

• repeats the most

• variation

Tags

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

How do you find the range?

• order least to greatest, then slash from each side until you reach the middle

• add the numbers in your data set, then divide by the amount you added

• look for the number that repeats the most

• highest number minus the lowest number

Tags

CCSS.6.NS.C.7

CCSS.6.SP.A.3

CCSS.6.SP.B.5

You have 8 pairs of socks in the dryer. Only one pair is black. You randomly choose two of the socks. What is the probability that you got both of the black socks? (Remember a pair of socks = 2 socks.)

•  $\frac{1}{120}$  

•  $\frac{1}{56}$  

•  $\frac{1}{8}$  

•  $\frac{1}{15}$  

• A

• B

• C

• D

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.8