Quan 102

Question 1

what are the two variable classifications

Answer 1

Quantitative
Categorical

Question 2

Quantitative

Answer 2

Discrete
Continuous

Question 3

Categorical

Answer 3

Nominal
Ordinal

Question 4

What are Nominal and Ordinal variables

Answer 4

Nominal - names of categories not ordered
Ordinal - if categories have a logical order

Question 5

What are discrete and continuous variables

Answer 5

Discrete - counts whole numbers only
Continuous - measurements in decimal

Question 6

When are bargraphs best used

Answer 6

discrete or categorical variables

Question 7

When are histograms best used

Answer 7

Quantitative data - discrete and continuous

Question 8

How do you find the standard deviation

Answer 8

Square root variance

Question 9

How do you find variance

Answer 9

square standard deviation

Question 10

What statistics is robust to outliers

Answer 10

Interquartile range

Question 11

Difference between Spearmen and Pearsons correlation

Answer 11

Pearsons - is designed for two quantitative variables
Spearmens - specifically for ranking data which is the case for ordinal variables

Question 12

what is the equation for a regression line

Answer 12

Y = increcept +slope x X

Question 13

How do you find the residuals

Answer 13

Actual y - predicted y

Question 14

End Effects meaning

Answer 14

Our inability to calculate the moving average at the end of a time series