2.4 Describing Quantitative Distributions

Question 1

SOCS

Answer 1

Shape, outliers, Center, Spread

Question 2

Modality

Answer 2

How many mounds (or peaks ) appear

Question 3

Shape: Uniform

Answer 3

a symmetric distribution when each of the values tends to occur with the same frequency, a histogram will look flat

Question 4

Shape: Bell-Shaped

Answer 4

symmetric distribution when most of the values fall in the middle, the frequencies tail off to the left and right, mirror image

Question 5

Right-Skewed Distribution

Answer 5

the tail extends out to the right, a few large values skew the distribution

Question 6

Left-Skewed Distribution

Answer 6

the tail extends out to the left, a few small values skew the distribution

Question 7

Notes on Modality

Answer 7

mounds can be different heights, bimodal and multimodal data may indicate existence of different groups within the data

Question 8

Outliers

Answer 8

extremely large or small values, don’t fit the pattern of the rest of the data, may be apparent visually

Question 9

Center

Answer 9

Typical value, if the distribution is multimodal, we should note the multiple typical values

Question 10

Spread

Answer 10

range of the data