Unit 1: Exploring One Variable Data

Question 1

“Describe the distribution…” means to write sentences about…

Answer 1

SOCS +C

Question 2

SOCS +C

Answer 2

Shape, Outliers, Center, Spread, +Context

Question 3

z-score formula

Answer 3

Question 4

What’s the shape of this histogram?

Answer 4

skewed right

Question 5

What’s the shape of this histogram?

Answer 5

skewed left

Question 6

What’s the shape of this histogram?

Answer 6

symmetric unimodal

Question 7

What’s the shape of this histogram?

Answer 7

uniform

Question 8

What’s the shape of this histogram?

Answer 8

symmetric bimodal

Question 9

What types of displays can be used with categorical variables?

Answer 9

Pie chart, bar graph, segmented bar graph, side-by-side bar graph, mosaic plot

Question 10

Name the type of variable that only uses names or categories of the data.

Answer 10

Categorical variable

Question 11

Name the type of variable that is a measurement.

Answer 11

Quantitative variable

Question 12

What types of displays can be used with one quantitative variable?

Answer 12

stem plot, box plot, histogram, dot plot

Question 13

What does this symbol represent?

Answer 13

population mean

Question 14

What does this symbol represent?

Answer 14

Sample mean

Question 15

What does this symbol represent?

Answer 15

population standard deviation

Question 16

What does this symbol represent?

Answer 16

sample standard deviation

Question 17

Measures of center are…

Answer 17

mean or median

Question 18

Measures of spread are…

Answer 18

standard deviation, IQR, or range

Question 19

IQR =

Answer 19

Question 20

Range =

Answer 20

max - min

Question 21

Definition of standard deviation

Answer 21

The average distance the data strays from the mean

Question 22

Interpret a z-score

Answer 22

the number of standard deviations above/below the mean

Question 23

When do you use the mean as the center?

Answer 23

When the distribution is symmetric

Question 24

When do you use the standard deviation as the spread?

Answer 24

When you have used the mean as the center

Question 25

When do you use the median as the center?

Answer 25

When the data is skewed or you are working with box plots

Question 26

When do you use IQR as spread?

Answer 26

When you used the median as center