# Probability and Statistics Chapter Exam

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Exam Progress:

### Page 1

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Question 1
1.
The table below shows number of wins for each team in 2014 and 2015:

Team 2014 wins 2015 wins

Center City 78 94

Suburbans 104 86

Exurbs 94 86

Countryside 24 56

Which team had the largest percentage increase in wins from 2014 to 2015?

#### Question 2 2. The Center City Sluggers won 78 softball games in 2014 and 94 games in 2015. What was their percentage increase in wins?

#### Question 3 3. The number of goals scored by 5 hockey teams is 115,87,78,64 and 58. What is the mean number of goals scored?

#### Question 4 4. A lacrosse team ended its season with a record of 24 wins, 16 losses and 8 ties. What was the probability it either won or tied a game?

#### Question 5 5. The number of goals scored by 5 hockey teams is 115,87,78,64 and 58. What is the median number of goals scored?

### Page 2

#### Question 6 6. The average price of a new vehicle sold in April 2016 was $33,560. In April 2015 it was $32,709. What was the percentage increase from April 2015 to April 2016?

#### Question 7 7. The number of wins for each baseball teams is in this data set: {100,98,92,86,78,76,74,70,56,48} The variance and standard deviation for wins is _____ and _____.

#### Question 8 8. During the 2015 season the Center City Sluggers won 47 softball games and lost 28. What was the relative frequency of their wins?

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Question 9
9.
The scores on a test in Prof. James Math Class are 100,98,96,95,95,90,82,82,78,74,72,66,and 54.

What are the mean and median scores?

#### Question 10 10. Marcus had the following math scores this school year. First semester {92,87,82,77,56} , second semester {96,93,85,82,72}. Which of the following statements is true?

### Page 3

#### Question 11 11. Maria is pulling marbles from a bag containing 10 red, 23 white and 17 blue ones. What is the probability that she pulls a red one flowed by a blue without replacement?

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Question 12
12.
Below are the results of a survey showing number of hours spent at work each day:

Hours Percent

10 + 4%

9-10 8%

8-9 35%

7-8 27%

6-7 12%

1-6 14%

Based on this information, what percentage of the respondents work less than 7 hours per day?

#### Question 13 13. The national sports participation rates for boys ages 10-15 are Soccer 35%, Football 18%, Basketball 25%, and Baseball 15%. In a school with 200 boys ages 10-15 how many would be expected to play Football?

#### Question 14 14. The mode of this data set {10.2, 12.4, 14.6, 13.8, 8.9, 7.6, 12.4, 15.2} is _____

#### Question 15 15. There are 10 possible candidates to fill 3 sales positions at a company. Half of the candidates are men and half women. What is the probability that all three positions are filled by men?

### Page 4

#### Question 16 16. The WNBA has 10 teams, 4 of them are located east of the Mississippi River. How many different combinations of the 4 teams located east of the Mississippi can meet for the championship?

#### Question 17 17. A lacrosse team ended its season with a record of 24 wins, 16 losses and 6 ties. What was the team's relative frequency of wins?

#### Question 18 18. Betty rides her bike over a 10 mile course 6 days each week. Her times for this week were 65 mins, 59 mins, 56 mins.,55 mins, 48 mins .and 48 mins. What is the mean time it took for her to complete her ride?

#### Question 19 19. Two cards are drawn from a standard deck of 52 (no jokers) without replacing the first card. What is the probability that both cards are clubs?

#### Question 20 20. Shown below is a table of colleges with their revenue from Hockey. From this information, Unicorn U. had approximately how much more revenue than Stanley State ?

### Page 5

#### Question 21 21. There are 10 competitors in a bike race. How many different ways can the racers finish in first and second place?

#### Question 22 22. Shown below is a table of colleges with their revenue from Hockey. Which two schools generated more than $10.0 million in revenue ?

#### Question 23 23. The Penguins won 5 out of the last 7 hockey games they played in. What was their relative frequency of wins?

#### Question 24 24. There are 15 tickets placed in a spinning hopper to determine the winner of a raffle for a new smartphone. Jesse purchased 5 tickets, Mary 4, Suzanne 3, Paul 2 and Phillip 1. What is the probability that either Paul or Phillip will win the new phone?

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Question 25
25.
Shown below is a table of colleges with their revenue from Hockey:

School Revenue
Unicorn U. $15.7 M
Central Coll. $12.6 M
Stick Tech $ 8.5 M
Stanley State $6.8M

Based on this information, by how much more revenue did Unicorn U. generate than Stick Tech?

### Page 6

#### Question 26 26. Betty rides her bike over a 10 mile course 6 days each week. Her times for this week were 65 mins, 59 mins, 56 mins.,55 mins, 48 mins .and 48 mins. What is the mode for the time it took for her to complete her ride?

#### Question 27 27. The weather forecast for Florida always has a 40% chance of rain each day in the summer. A gardener there asks you what is the chance it will rain at least once over a three day period. You tell her it is _____

#### Question 28 28. Maria has calculated the variance of her data set. When she takes the square root of the variance she will get the _____

#### Question 29 29. If the variance of a data set is 81, the standard deviation is _____

#### Question 30 30. There is a competitive political race between three candidates, Hinton, Stump and Landers. A survey is taken of 200 voters as they leave a polling place. 95 voters say they voted for Candidate Hinton, and 55 say they voted for Candidate Stump. How many voted for Candidate Landers?

#### Probability and Statistics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next question. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. You will lose your work if you close or refresh this page. Good luck!