Probability and Stats Review

Find the mean of the following data set: 24, 19, 30, 39, 22, 19, 26, 35, 42, 15, 25.

• 26.5

• 28.1

• 26.9

• 25.9

Tags

CCSS.6.SP.B.5C

What is the median of the data set: 2, 30, 6, 26, 6, 16, 25, 19, 22, 20, 21, 20?

• 20

• 19.5

• 21

• 22

Tags

CCSS.6.SP.B.5C

Calculate the range of the data set: 20, 23, 19, 25, 21, 23, 5, 24, 9, 23.

• 20

• 19

• 18

• 21

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

What is the standard deviation of the data set: 27, 34, 45, 30, 26, 42?

• 7.5

• 6.8

• 8.2

• 7.2

Identify the type of sample described. Then, tell if the sample is biased. Explain your reasoning. A consumer advocacy group wants to know if car owners believe their car is reliable. The group randomly selects 1020 car owners and mails out a survey to each one.

• Random sample, not biased

• Convenience sample, biased

• Systematic sample, not biased

• Voluntary response sample, biased

Identify the type of sample described. Then tell if the sample is biased. Explain your reasoning. A grocery store wants to know which day of the week consumers prefer to do their grocery shopping. Everyone who shops on Friday is asked which day of the week they prefer to do their grocery shopping.

• Random sample, not biased

• Convenience sample, biased

• Systematic sample, not biased

• Voluntary response sample, biased

What is the mode of the data set: 15, 22, 15, 18, 19, 22, 15, 20?

• 15

• 18

• 22

• 19

Identify the type of sample described. Then, tell if the sample is biased. Explain your reasoning. A school wants to know students' favorite lunch option. They survey every 10th student entering the cafeteria.

• Random sample, not biased

• Convenience sample, biased

• Systematic sample, not biased

• Voluntary response sample, biased

A spinner is given below. What is the theoretical probability that it will land on a NOT red space?

• 3/8

• 1/8

• 1/4

• 5/8

A bag contains seven red marbles and six blue marbles.  You randomly pick a marble and then return it to the bag before picking another marble.  Both the first and second marbles are red. Write answer as a fraction.