2.1 Quiz Review

Question 1

the value with p% of observations less than or equal to it

Answer 1

Percentile

Question 2

Number of values ≤ X
——————————— • 100
Total number of values

Answer 2

Percentile formula

Question 3

Bob had a score in the 72nd percentile of the distribution.

Interpret this value in context

Answer 3

72% of the students on the class earned a score less than or equal to Bob’s score

Question 4

If Bob scored in the 72nd percentile in a class of 25, what was his score?

Answer 4

(0.72) • 25 = 18

The 18th number in the dataset

Question 5

Cumulative means all together

True/False

Answer 5

True

Question 6

First 25% of the data

Answer 6

Q1

Question 7

First 75% of the data

Answer 7

Q3

Question 8

Middle 50% of the data

Answer 8

Median

Question 9

The IQR is the difference between the Q3 and the Q1

True/False

Answer 9

True

Question 10

X - Mean
——————————
Standard Deviation

Answer 10

Z score formula

Question 11

Tells us how many SD’s a piece of data is from the mean of the distribution

Answer 11

Z scores

Question 12

Median is a measure of…

Answer 12

Center

Question 13

Mean is a measure of…

Answer 13

Center

Question 14

Range is a measure of…

Answer 14

Spread

Question 15

IQR is a measure of…

Answer 15

Spread

Question 16

SD is a measure of…

Answer 16

Spread

Question 17

Minimum is a measure of…

Answer 17

Location

Question 18

Maximum is a measure of…

Answer 18

Location

Question 19

Q1 and Q3 is a measure of…

Answer 19

Location

Question 20

Shape is not affected by adding, subtracting, multiplication, or division

True/False

Answer 20

True

Question 21

Location is affected by addition, subtraction, multiplication, and division

True/False

Answer 21

True

Question 22

Spread is affected by adding, subtracting, multiplication, and division

True/False

Answer 22

False

spread is only affected by multiplication and division