Descriptive statistics

Question 1

what are measures of central tendency?

Answer 1

methods of estimating mid point scores in sets of data

Question 2

what are the three measures of central tendency?

Answer 2

mean
median
mode

Question 3

eval median

Answer 3

S: not affected by extreme scores or anomalies
can be used in ordianl data unlike mean
W: not as sensitive as the mean as not all data is taken into account
can be unrepresentative in a small set of data

Question 4

eval mean

Answer 4

S; most accureate measure of central tendency
uses all data in calculations
W: less useful if some scores are skewed/ anomalies
mean score might not be part of the data

Question 5

eval mode

Answer 5

S: less prone to distortion by extreme scores
W; can be more than one mode in a set of data
doesn’t use all the scores

Question 6

what are measures of dispersion?

Answer 6

measurements of the spread of scores with a set of data.

Question 7

what is standard deviation?

Answer 7

used to show how data is distributed around the central point( mean)

Question 8

eval standard deviation

Answer 8

S: is a more sensitive dispersion measure than range bc all scores are used
W: allows for the interpretation of individual scores

sidenote- the larger the spreader of scores teh greater the standard deviation.

Question 9

other measures of dispersion?

Answer 9

range
percentages
correlational data