Probability and Statistics Study Guide

Probability and Statistics Study Guide

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Multiple Choice

• The probability of randomly selecting a picture that shows Justin with his friends is greater than the probability of randomly selecting a picture that shows Justin with his family.

• The probability of randomly selecting a picture that shows Justin is 8%.

• The probability of randomly selecting a picture that shows Justin with his family is 5 times the probability of randomly selecting a picture that shows only his friends.

• The probability of randomly selecting a picture that does not show Justin is 21%.

Multiple Choice

• The probability of selecting a purple paper clip is $$\frac{3}{4}$$ , and the probability of selecting a paper clip that is not purple is $$\frac{1}{4}$$ .

• The probability of selecting a purple paper clip is $$\frac{1}{4}$$ , and the probability of selecting a paper clip that is not purple is $$\frac{3}{4}$$ .

• The probability of selecting a purple paper clip is $$\frac{18}{25}$$ , and the probability of selecting a paper clip that is not purple is $$\frac{7}{25}$$ .

• The probability of selecting a purple paper clip is $$\frac{7}{25}$$ , and the probability of selecting a paper clip that is not purple is $$\frac{18}{25}$$ .

Multiple Choice

A student will spin two spinners in an experiment. The tree diagram shows all possible outcomes of the experiment.

Which sample space is described by this tree diagram?

• {(1, R), (1, T), (1, Z), (2, R), (2, T), (2, Z), (3, R), (3, T), (3, Z)}

• {(1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), (3, 3), (1, R), (1, T), (1, Z), (2, R), (2, T), (2, Z), (3, R), (3, T), (3, Z)}

• {(1,2,3), (R,T,Z)}

• {(1,R,T,Z), (2,R,T,Z), (3,R,T,Z)}

Multiple Choice

Based on the results in the table, complete the statement about the pies sold at Mrs. Baird's during one week to make it NOT true.

It is ____________ for an apple or lemon pie to be sold than for a pecan or chocolate pie to be sold.

• Equally Likely

• 3x as likely

• most likely

Fill in the Blanks

The spinner shown has 4 equal-sized sections. Jackson spins the spinner 32 times. The results are shown in the table.

Based on the information in the table, in how many of the next 160 trials will the spinner land on C? In the next 160 trials, the spinner should land on C

times.

Fill in the Blanks

A bag contains colored tiles.

• 3 tiles are red

• 6 tiles are green

• 3 tiles are blue

A tile will be randomly selected from the bag. What is the probability in decimal form that the tile selected will be green?

(Enter Number in decimal form)

Multiple Choice

The table shows the number of bottles of different kinds of juice sold at a cafeteria on Monday.

If the cafeteria has 80 customers on Tuesday, which prediction for Tuesday is NOT supported by the data in the table?

• The number of bottles of cranberry juice sold will be 6 more than the number of bottles of pineapple juice sold.

• The number of bottles of apple juice sold will be 6 times the number of bottles of cranberry juice sold.

• There will be a total of 50 bottles of orange and cranberry juice sold.

• The difference between the number of bottles of apple juice sold and the number of bottles of pineapple juice sold will be 14.

Fill in the Blanks

If each spinner has equal-sized sections, what is the probability of selecting a B on the first spinner and a Z on the second spinner, in the form of a fraction?

The probability of selecting a B on the first spinner and then a Z on the second spinner is

.

(Enter in fraction form)

Multiple Choice

Based on the information in the table, complete the following inferences about the students at Isaiah's school. Choose the correct answer from each drop-down menu to complete the statement.

The students at Isaiah's school are

____________

 to like the genres of rock or country than the genre of pop

• More Likely

• Equally Likely

• Less Likely

Multiple Choice

A survey was conducted to determine the food choices of the 80 students at a picnic. The types of picnic foods are shown in the circle graph.

 

 

Based on the circle graph, how many more students chose pizza than students who chose salad?

• 8

• 16

• 34

• 24

Multiple Choice

Mari bought 6 packets of tomato seeds. Each packet contained 24 seeds. She planted 1 packet of the seeds, and 15 seeds sprouted. Which statement about the seeds in the remaining packets is best supported by this information?

• No more than 50 seeds will sprout.

• Between 50 and 100 seeds will sprout.

• At least 100 but no more than 120 seeds will sprout.

• All 120 seeds will sprout.