Descriptive Stats

Question 1

Categorical

Answer 1

category assigned to each data point (eg. male/ female)

Question 2

Discrete/ Ordinal

Answer 2

Data points are placed in logical order, with set intervals (eg. 1st 2nd 3rd)

Question 3

Continuous (scale)

Answer 3

data points are ranked on a logical scale (relative difference between scores have meaning) eg. temp, weight, reaction times

Question 4

Measures of central tendency?
define use
name 3

Answer 4

best guess about the typical value in sample
mean
median
mode

Question 5

Measures of Dispersion

Answer 5

best guess about typical spread of data in the sample
range
variance - sum of squared deviance (divided by)
total sample size
standard dev.

Question 6

limitation of using variance and solution?

Answer 6

the unit is the square of the measurement unit (eg.IQ^2)

solutions = square root variance to convert back to normal score

Question 7

Reporting Descriptive stats:

Answer 7

State what your’re finding (sample size), state mean (SD, range)