Statistics

Is this a biased or unbiased sampling method?

To determine the most popular children’s programs, a television station asks parents to call in and complete a phone survey. The television station finds that the children’s programs that are animated are the most popular.

• Biased

• Unbiased

What is the probability that a student will prefer soccer?

• 3/20

• 1/4

• 2/5

• 1/5

There are 550 students in the school. Predict how many students at the school prefer track and field.

• 110

• 220

• 138

• 83

A survey showed that 55% of a travel company’s customers were planning an overseas vacation the following year. Predict how many of the travel company’s 12,400 travelers will vacation overseas the following year.

• 837 people

• 6,200 people

• 225 people

• 6,820 people

The results of a survey asking teens their favorite type of book to read is shown.

Out of 250 teens, predict how many would

choose mystery as their favorite type of book to read.

• 33 teens

• 93 teens

• 63 teens

• 37 teens

The high temperatures for a 7-day week during December in Chicago were 29°, 31°, 28°, 32°, 29°, 27°, and 55°.

Find the mean and median for this set of data.

• Mean: 35, Mode: 27

• Mean: 42, Mode: 55

• Mean: 33, Mode: 29

• Mean: 29, Mode: 32

The batting averages for 10 members of a baseball team are 0.234, 0.256, 0.321, 0.333, 0.290, 0.240, 0.198, 0.222, 0.300, and 0.276. Find the median batting average.

• 0.256

• 0.240

• 0.266

• 0.276

• A

• B

• C

• D

Find the range for this set of data.

19, 27, 16, 98, 15, 9, 2, 18, 36

• 96

• 27

• 89

• 98

One of the events in the Winter Olympics is the Men’s 500-meter Speed Skating. The times for this event are show to the right. Find the mode for this set of data.

• 39.44

• 40.6

• 40.2

• 43.4