Beginning Statistics

A survey should always be ____ and ____.

• random and biased

• random and unbiased

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• thirty students who are often tardy

• thirty students who are rarely tardy

• thirty of her friends

• thirty randomly selected students from her school

What is the mean?

4, 5, 6, 7, 3, 4, 10, 1

• 7

• 4.5

• 5

• 8

Find the mode:

3.8, 4.2, 4.0, 4.2, 4.2

• 4.2

• 3.8

• 4.0

• 4

What is the median of this data set?
3 , 17 , 17 , 11 , 8 , 13 , 5 , 18

• 11

• 12

• 13

• 17

Marco bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Marco's scores?

• 193

• 127

• 60

• 66

How many total students are in the science class?

• 13

• 6

• 27

• 25

What was the day with the least amount of cars sold? 

• Monday

• Tuesday

• Wednesday

• Thursday

How many cars were sold on Monday and Tuesday?

• 13

• 5

• 11

• 2

What is the difference between the highest score and the lowest score on the test?

• 15

• 100

• 6

• 10