Lecture 6 Descriptive Stats

Question 1

What are descriptive stats

Answer 1

Starting points to understand your data
- most common indicators are measures of central tendencies and measures of variability

• tells the story of your data

Measures of central tendencies
-mean
-median
-mode

Question 2

What does it mean when the data is skewed

Answer 2

If the data is skewed that means that it goes to one side which would make the MEDIAN the best descriptors of the data

Question 3

What does a negatively skewed data look like

Answer 3

Flat on left side

Question 4

What are the scales of measure

Answer 4

NOIR!!!
Nominal - gender, race, religion
Ordinal - MMT, function, pain scale
Interval - calendar year, degrees
Ratio - distance, age, weight

Question 5

From the scale of measurements, what are measured from true zeros

Answer 5

Interval and ratio

Question 6

What type of scale of measurement would be best represented by the mean, median, or mode

Answer 6

Nominal = mode
Ordinal = median and mode
Interval = mean, median, mode (all 3)
Ratio = mean, median, mode (all 3)