1.2 Pictorial and Tabular Methods in Descriptive Statistics

Question 1

Define Class

Answer 1

A category into which qualitative data can be classified

Question 2

Define Class Frequency

Answer 2

The number of observations in the dataset that fall into a particular class (popularity of the class)

Question 3

CalculateClass Relative Frequency

Answer 3

Class Frequency divided by total number of observations

Question 4

Calculate Class Percentage

Answer 4

ClassRelativeFrequency*100

Question 5

Describe 3 Charts for describing Qualitative Data

Answer 5

Bar Chart
Pareto Chart: Bar chart in descending order
Pie Chart: Find angle: Pie% X 360*

Question 6

What is the difference between Discrete Random Variables and Continuous Random Variables?

Answer 6

Discrete Random Variables: Interger numbers

Continuous Random Variables: Occur over a range of values

Question 7

Describe 3 Charts for describing Quantitative Data

Answer 7

Dot Plots: Dots stack when plenty
Stem&Leaf: Divide each observation into Stem&Leaf
Histogram: Displays the relative distribution of data.

Question 8

How do you make a Frequency Distribution Table

Answer 8

1. Determine Range
2. Select # of Classes
3. Compute Class Intervals
   Count Observations and assign to each Class