Chapter 3- Exploring Data: Central Tendency

Question 1

Mean

Answer 1

X bar
Sum of the scores divided by the number of scores

Degree of uncertainty that goes with x bar just because it is from a sample

Question 2

Median

Answer 2

Point that divides the distribution of scores RIGHT down the middle, regardless of the data point values

Need to put your numbers in descending order for this to work

When giving group- give the actual number NOT the group

Question 3

Median location

Answer 3

N+1/2

The medians position

Question 4

Mode

Answer 4

Most frequently occurring number. Score with the highest frequency

You can have multiple modes
.

Question 5

Fx

Answer 5

F multiplied by x

Question 6

Mean? What measure of central tendency would I say?

Answer 6

Interval and ratio. Because there are actual real quantifiable differences between each other

Question 7

Median

Answer 7

Ordinal, interval, ratio

Question 8

Mode

Answer 8

All scales!!

Question 9

Know how calculate weighted mean

Answer 9

Multiply by percentage
Add total
Divide by N