# Praxis Mathematics: Statistics Chapter Exam

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#### Question 1 1. What are groups of information that are scaled and separated equally?

#### Question 2 2. Using the bar graph, 'Top Ten U.S. Rentals in 1999', about how much money did the movie American Pie have in revenue?

#### Question 3 3. The tail lengths of a certain animal are normally distributed with a mean length of 1.5 feet and a standard deviation of 3 inches. What percentage of these animals have a tail that is at most one foot long?

#### Question 4 4. All of the students in Jasmine's class have had their height measured. Jasmine is the 12th tallest person out of 560 students. What percentile is Jasmine's height in?

#### Question 5 5. When you find a relationship in bivariate data, you are looking at a positive or a negative _____.

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#### Question 6 6. A statistician makes a graph, which includes a shape that's almost mirrored perfectly across a line, but not quite. How should we describe the shape?

#### Question 7 7. All of the following statements are correct, EXCEPT:

#### Question 8 8. If there are two modes, you should _____.

#### Question 9 9. Using the box plot provided, what is the rectangle circled in red?

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Question 10
10.
Find the standard deviation for the following data set:

101, 106, 125, 142, 78, and 109

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#### Question 11 11. The _____ refers to the consistent change between x and y in a formula.

#### Question 12 12. A scientist is conducting an experiment on mice, seeing how their weight is affected by the volume of cheese they're given. What is the independent variable in this experiment, and why?

#### Question 13 13. Which of the following problems could be studied through the use of regression analysis?

#### Question 14 14. Using the Pie Chart 'Who Sells The Most Fast Food?', which fast food restaurant had about 17 Billion in sales?

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Question 15
15.
For the following data set, select the best method for summarizing the data.

3, 3, 4, 5, 2, 9, 5, 2, 3, 4

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#### Question 16 16. All the members of a specified group are known as:

#### Question 17 17. What is a type of random sampling where the variables have an equal, and unsystematic, chance of selection?

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Question 18
18.
Find the regression line equation using the formulas for the following data set:

(1, 3) (2, 4) (3, 5)

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Question 19
19.
Susanne has a set of data she is using to create a histogram. If the set of numbers below is her data set, then which number in the data set will create the highest peak?

2,2,3,5,6,7,8,6,5,2,3,4,2,5,6,2

#### Question 20 20. In statistics, a sample:

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#### Question 21 21. The lifespan of a certain battery is measured in cycles. A manufacturer claims that the average number of cycles for their battery is 2000 with a standard deviation of 100, and the number of cycles is distributed normally. You wish to buy a battery from this manufacturer. What is the probability that the battery will last between 1900 and 2200 cycles?

#### Question 22 22. A _____ attempts to predict the relationship between two points.

#### Question 23 23. One variable in a data set that is analyzed to describe a scenario or experiment is called _____

#### Question 24 24. A(n) _____ is all members of a specified group.

#### Question 25 25. If you have a data set, and you need to look at what numbers in the population fall below a certain value, what is a visual representation you can create to help analyze the data?

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#### Question 26 26. When a data set is visually symmetrical, what occurs all at the same point?

#### Question 27 27. What is a graph of ordered pairs showing a relationship between two sets of data?

#### Question 28 28. Using the box plot provided, what is the vertical line circled in red?

#### Question 29 29. What is a single number that summarizes an entire data set?

#### Question 30 30. What is the term for data that is grouped by type or object, not by numbers?

#### Praxis Mathematics: Statistics Chapter Exam Instructions

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!