Section 9 and 10 review part 2

A company is doing market research on a new product and have selected a random sample of potential customers to help choose the most effective TV commercial. The two-way frequency table represents the results. How many people are likely to buy after watching version 2 of the commercial?

• 99

• 20

• 30

• 79

Correlation or Causation?

The speed you drive and the amount of fuel you use

• Correlation

• Causation

There's a correlation coefficient of r=0.3 between the amount of ice cream you eat and your age. Which statement best describes the correlation?

• Strong positive

• Weak positive

• Strong negative

• Weak negative

After performing analyses on a set of data, Mrs. Schoeneck examined the scatter plot of the residual values for each analysis. Which residual plot indicated the best linear fit for the data?

• A

• B

• C

The data below represents the number of essays that students in Mr. Ji's class wrote.

2, 3, 5, 5, 6, 7, 8, 8, 11

Which box plot correctly summarizes the data?

• 
• 
• 
• 

What is the equation of the line of best fit

• y= -2x + 10

• y= 10x+ 2

• y=2x+10

• y= 10

Which of the following statements is true?

• Top plot has a smaller median

• Top plot has a smaller minimum

• Bottom plot has a smaller range

• 75% of top plot is over 70

Find the Quartile 3 (the upper quartile).

5, 5, 9, 12,18, 22, 25,

• 22

• 18

• 25

• 12

Beyoncé recently posted a new music video on Twitter at 4:00 am and the retweets were tracked per hour after the post. Beyonce used the following function to model the relationship between the hours since her initial post and the number of retweets.

f(x) = 138.9x - 218.76

3 hours after the post she had 162 retweets. What would be the residual for the total amount of retweets after 3 hours?

• -35.94

• 35.94

• 197.94

• -197.94

What percent of people who play an instrument do not play a team sport?

• 80%
• 27.2%
• 40%
• 90.1%