Ed 318 Q1

Front 1

Define population statistics; they are distinguished by the use of ___case letters

Back 1

Data collected from all members of a population;
(lowercase)

Front 2

Define sample statistics;
they are distinguished by the use of ___case letters

Back 2

Statistics taken from a sample of members within a population;
(UPPERCASE)

Front 3

All statistics are based on two concepts:

Back 3

1.Central Tendency
2. Variance

Front 4

What are the three primary measures of central tendency:

Back 4

mean, median and mode

Front 5

The mean is also known as____?

Back 5

arithmetic average

Front 6

Define median

Back 6

the middle number when all values are arranged in order

Front 7

Define mode

Back 7

the number that appears most frequently

Front 8

The equation for mean:
where as mu is the___?
and (x) is the___?

Back 8

mu=Ex/N
mu-population
(x)-sample

Front 9

One would compute the "score spread" by using which mathematical concept?

Back 9

Standard deviation

Front 10

KNOW SD POPULATION FORMULA (in notes)

Back 10

KNOW SD SAMPLE FORMULA (in notes)

Front 11

List the 5 steps of how to "score spread"

Back 11

1. Find the mean of the scores
2. Subtract the mean from each score (deviation score)
3. Square the deviation scores.
4. Sum the squared deviation scores and divide by n (pop) or n-1 (sample) to get the variance.
5. Take the square root of the variance.