Vocabulary Study from the In-Class Review and the Homework

Algebra 1-2 DA Name______Data Unit Test Review Extra

Vocabulary – Study from the in-class review and the homework 1) Identify the relationship between the two quantities in the given question as causation or correlation. a. The student with the most correct answers on a test also had the highest grade.

b. Areas of the city with higher crime rates also have a higher homeless rate.

c. Children whose parents smoke are more likely to exhibit delinquent behavior.

d. The calories burned during a workout increases when the workout intensifies.

2) The following graph depicts the relationship between the number of hours that the orchestra practiced and the number of great performances. A. The data represents which type of correlation? a. Weak b. Positive c. Negative d. None

B. Which statement can be concluded about the data?

a. There is no correlation between the number of hours practiced and the number of great performances. b. There is a correlation between the number of hours practiced and the number of great performances. c. There is a causation between number of hours practiced and the number of great performances d. Great performances lead to more hours practiced.

C. If possible, draw in a line of best fit.

D. Explain why you think the line is a good fit.

3) Identify sample as biased or unbiased a. To get reactions about a benefits package, a company uses a computer program to randomly pick one person from each of its departments.

b. A magazine is trying to determine the most popular actor of the year. They survey everyone leaving the latest Patrick Cumberbatch movie.

c. Survey regarding all sophomores: every 10th sophomore student is surveyed.

d. The nurse uses the football lineman to determine average weight of CHS boys. 4) The question you are investigating is: Should more money be put into the CHS athletic program or the performing arts program? Which group of people could be used to obtain an unbiased sample for this question? a. Every 5th parent leaving a CHS orchestra concert b. Every 10th parent of all CHS students c. Every 5th parent leaving a CHS basketball game

5) Use the following scenario to answer the questions: You want to know which is the better gaming device, the iPhone6 or the Galaxy s6. You read on the internet that a 500 owners of each type of phone were asked the same questions.

a. What is the bias is this scenario?

b. Whose interests might be served in this scenario? 6) Tell whether the correlation coefficient for the data is positive, negative or no correlation.

7) Use the graph at the right to answer the following questions: a. Choose two points on the graph so that a line through them closely represents the pattern of all the points on the graph. A. (-2, 0) & (3, -5) B. (-5, 6) & (-1, 4) C. (0, 0) & (-1, 4) D. (2, -2) & (-5, 6)

b. Draw the line on your graph. c. Use the two points to calculate the slope.

d. Write an equation in point-slope form using your slope and a point.

e. Now write your equation in slope-intercept form. 8) The data is summarized in a two-way table for the gender and the favorite soda. Complete the table first. Then calculate the percentage to the nearest tenth.

Students Surveyed at CHS Coca- Sprite Mountai Pepsi Total Cola n Dew Boys 41 24 55 10 Girls 57 30 25 64 Total

______Calculate the percentage of boys.

______Calculate the percentage that like Sprite and are girls.

______Calculate the percentage of girls who like Coca-Cola.

______Calculate the percentage of boys who like Coca-Cola. ______Calculate the percentage who like Sprite.

______Calculate the percentage that like Coca-Cola and are boys.

______Calculate the percentage of girls who like Pepsi.

______Calculate the percentage that like Mountain Dew and are girls.

______Calculate the percentage of girls.

______Calculate the percentage that like Pepsi and are boys.

______Calculate the percentage who like Mountain Dew.

______Calculate the percentage of girls who like Sprite.

______Calculate the percentage of boys who like Mountain Dew.