Data Unit

A candy store receives a shipment of 2000 jellybeans, of which 150 are defective. The store owner does not know this but tests a random sample of 25 jellybeans to look for defects. Use a graphing calculator to generate a random sample.

Was your sample representative of the entire shipment? Explain.

Over 6 days, Dan jogged 7.5 miles, 6 miles, 3miles, 3 miles, 5.5 miles, and 5 miles. What is the mean distance that Dan jogged each day?

• 3 miles

• 5 miles

• 5.25 miles

• 7.5 miles

Which of the following is a random sample?

• A radio DJ asks the first 10 listeners who call in if they liked the last song.

• 20 customers at a chicken restaurant are surveyed on their favorite food.

• Members of a polling organization survey 800 registered voters by randomly choosing names from a list of all registered voters.

• Rebecca used an email poll to survey 100 students about how often they use the internet.

Which data set has a mean absolute deviation of 0.64?

• W

• X

• Y

• Z

For which situation could flipping a coin be used to simulate a random sample?

• To predict the number of defective cellphones in a shipment of 2000 phones.

• To predict the number of days in a month it will rain.

• To predict the number of blue marbles in a box of 200 marbles.

• To predict the number of boys or girls born at a hospital in a year.

Which scatter plot shows a linear relationship between x and y?

• Graph A

• Graph B

• Graph C

• Graph D

• 14 cm
• 5.6 cm
• 10 cm
• 17.5 cm

What percent of people who attended the basketball game also attended the school play?

• 38%

• 47%

• 25%

• 54%

What type of association does this graph have?

• positive 

• negative

• none

• all of the above

What is the correlation?

• Negative correlation

• No correlation

• Positive correlation

• All of the above