Research Methods 3n4 Standard Deviations

Question 1

Standard deviation is

Answer 1

A measure of variability of a set of scores around its mean

Question 2

Small standard deviations

Answer 2

Shows scores quite close to mean
Results not greatly affected by individual diffs

Question 3

Large standard deviations

Answer 3

Scores not very close to mean
Results r affected by individual diffs

Question 4

Positive skew

Answer 4

Right foot
Smallest toe is tail
Means is highest mode is lowest median in middle as always

Question 5

Negative skew

Answer 5

Left foot
Smallest toe is tail
Mean is lowest mode is highest median is middle

Question 6

Normal skew

Answer 6

No toes or foots
Median mode n mean all same

Question 7

Research methods 3n4
Mean central tendancy

Answer 7

Arithmetic average
How to calculate
Pro-
Most sensitive measure
Cus uses all values
Con-
Unrepresentative if extreme values

Question 8

Research methods 3n4
Mode central tendency

Answer 8

Is value set of scores occurring most frequently
Pro-no affected by anomalies
Con-dosnt use all data cus
Can be more than one answer

Question 9

Research methods 3n4
Median central tendency

Answer 9

Is middle value when numbers in numerical order
Pro-not affected by anomalies
Con-dosnt use all available data
Anomalies ignored
Dosnt work well with small sets of data