Probability and Sampling Review

A bag has 3 red marbles, 2 blue and 4 yellow. What is the theoretical probability of pulling a red?

• 3/10

• 3/9

• 1/9

• 1/3

Find the probability of rolling a 7 on a single die.

• $\frac{1}{6}$

• $\frac{7}{6}$
  

• 0

• $\frac{7}{7}$
  

What is the theoretical probability of spinning a red or a yellow?

• $\frac{2}{5}$

• $\frac{1}{5}$

• $\frac{3}{5}$

• $\frac{0}{5}$

At a middle school, the 7th graders will conduct a survey for where to go on a field trip. Which method will result in the least biased decision?

• to randomly ask 8th grade students who went on a field trip last year

• to randomly choose some 7th grade students to select a location

• to ask all 7th grade teachers and administrators for a location

• to ask the student council to choose a location

The following M & M colors are in the bowl:
4 yellow, 6 orange, 3 green, 5 blue, 2 brown
What is the probability of selecting a brown candy?

• 2/18

• 1/9

• 2/20

• 1/10

What is the probability you spin something larger than 10

• 5

• 3/10

• 10/15

• 3/8

The daily special at the House of Pies offers one of three featured pies and your choice of coffee, tea, milk or juice. How many ways can you order the special?

• 12

• 8

• 15

• 6

The population describes:

• The group of people, objects or events being surveyed

• a part of the group being surveyed

• the whole world

• the school

True or False: all samples lead to a good prediction about an entire population.

• True

• False

Unbiased sampling is:

• when you choose the group you think will give you the answer you want, accept volunteers or survey by convenience

• when any member of the population is equally likely to be chosen for the sample