Unit 13 (Statistics)

Question 1

The mean of a set of numbers is

Answer 1

The average

Question 2

You find the mean by

Answer 2

Adding the numbers in the set together and dividing by the number of numbers in the set

Question 3

The median of a set of numbers is

Answer 3

The middle

Question 4

You find the median by

Answer 4

Ordering the set of numbers in numerical order and finding the middle

Question 5

The mode of a set of numbers is

Answer 5

The most repeated number

Question 6

A quartile of a set of numbers is

Answer 6

25%

Question 7

The interquartile range of a set of numbers is

Answer 7

the range from quartile 1 to 3

Question 8

The standard deviation of a set of numbers is

Answer 8

The average distance between numbers in a set

Question 9

A z score is

Answer 9

The number of standard deviations it takes to get to a value in a bell-shaped curve.

Question 10

One standard deviation above and below the mean in a bell-shaped curve is

Answer 10

about 68%

Question 11

Two standard deviations above and below the mean is

Answer 11

about 95%

Question 12

The range of a set of numbers is

Answer 12

The distance from the maximum value to the minimum value

Question 13

You find the range by

Answer 13

Subtracting the minimum from the maximum

Question 14

The percentile of a data point is

Answer 14

the percent of the population less than the data point

Question 15

You find the percentage on a bell curve on a calculator by pressing

Answer 15

2nd => vars (distr) => normal cdf/pdf

Question 16

μ means

Answer 16

the mean

Question 17

σ means

Answer 17

the standard deviation

Question 18

the formula for z score is

Answer 18

z = (x-μ)/σ

Question 19

a z score table is used for

Answer 19

finding

Question 20

a percentile is

Answer 20

the percent of a population less than a data point