# Praxis I Math: Data & Statistics Chapter Exam

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#### Question 1 1. In a fish tank there are 10 clown fish, 4 angel fish, 6 puffer fish, and 5 eels. What is the probability of scooping out a clown fish on the second scoop after scooping out a clown fish on the first scoop and not replacing it? Give your answer as a fraction in its most reduced form.

#### Question 2 2. While playing with a standard deck of playing cards, what is the probability that Jim's 5th card will be red after selecting 4 cards that were also red and not replacing them? (Hint: There are 52 cards in a deck which contains 26 red and 26 black cards.)

#### Question 3 3. What is a condition or piece of data in an experiment that can be controlled or changed?

#### Question 4 4. How are independent variables and dependent variables different?

#### Question 5 5. For which case do you use median rather than mean to calculate the center?

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#### Question 6 6. What is the center of this graph?

#### Question 7 7. This graph shows the number of rabbits a breeder has each month. When did the breeder reach 100 rabbits?

#### Question 8 8. What is a line graph?

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Question 9
9.
The following data represents the test scores of eight students in Mr. Miller's science class.

92%, 91%, 89%, 95%, 45%, 88%, 90%, 91%

The student who got a 45% is _____.

#### Question 10 10. If there are two modes, you should _____.

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#### Question 11 11. The bar graph shows the top five grossing movies from 2015. What was the second highest grossing movie?

#### Question 12 12. The bar graph shows the top five grossing movies from 2015. About how much money did Inside Out gross?

#### Question 13 13. What is a type of random sampling where the variables have an equal, and unsystematic, chance of selection?

#### Question 14 14. Simple random sampling is usually done _____.

#### Question 15 15. A newspaper company is selecting four houses to receive a free newspaper on your block. There are 10 houses on your block that are numbered 1-10. What is the probability that the four houses selected for a free newspaper will all be even numbered houses?

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#### Question 16 16. Jane has cards with the letters ALABAMA on them. She lays the cards face down. What is the probability of Jane selecting two cards and both of them being a vowel?

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Question 17
17.
For the following equation, identify the slope, the intercept, and interpret the meaning of each for the scenario.

y= 3x + 25

Jay just got his water bill. He has to pay an initial fee for the service, plus an amount per gallon that he uses.

#### Question 18 18. How does a regression line show the relationship between two points?

#### Question 19 19. Jimmy has the letters for the state of MISSISSIPPI written on cards, one letter per card. He turns the cards over and mixes up the order. If he selects one card at a time without replacing the cards, what is the probability that he will spell the word MISS in order?

#### Question 20 20. Twenty students compete in a school-wide marathon and each student is of comparable running ability. Of the 20 students, 15 were boys and 5 were girls. What is the probability that girls will place 1st, 2nd, and 3rd in the marathon?

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#### Question 21 21. What is a condition or piece of data in an experiment that can be controlled or changed?

#### Question 22 22. A scientist is designing an experiment with rats, and designates weight as the dependent variable. Why might this be the case?

#### Question 23 23. A(n) _____ is all members of a specified group.

#### Question 24 24. Which of the following is a type of random sampling?

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Question 25
25.
Find the variance for the following data set:

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

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Question 26
26.
Find the standard deviation for the following data set:

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

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Question 27
27.
What is the best equation for the following scenario?

A mountain climber starts at the bottom of a mountain and climbs at a rate of 20 feet per hour. What equation represents his rate of climbing?

#### Question 28 28. The length and steepness of a line that shows the rate of change between two values is called the _____.

#### Question 29 29. Jenny has a bowl of M&M's that has 6 brown, 3 green, 4 red, and 12 yellow M&M's. She selects a yellow M&M and does not replace it. What is the probability that her second selection will be a brown M&M?

#### Question 30 30. What is a graph of ordered pairs showing a relationship between two sets of data?

#### Praxis I Math: Data & 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!