Descriptive Satistics

Question 1

What is the MEAN?

Answer 1

Add up all values

Divide by Nō of values

Question 2

AO3: Evaluate the MEAN

Answer 2

✅️ All scores of calc= representative of data

❌️All effected by extreme values/ outlier
Only use for universal measures

Question 3

What is the MEDIAN?

Answer 3

Arrange lowest to highest

= one in the middle

Or halfway beyween 2 middle scores

Question 4

AO3: Evaluate the MEDIAN

Answer 4

✅️ Not affected by extreme values
• easy to calc
• used for all values e.g. rating acale

❌️Not include all values= not representative of data

Question 5

What is the MODE?

Answer 5

Value than occurs the most

If 2= bimodal

Question 6

AO3: Evaluate the MODE

Answer 6

✅️ easy to calc
• used for categories= demonstrates value

❌️ Not representative as diff ans from Mean+ Median

Question 7

What are the measures of dispersion?

Answer 7

Measure of variation of scores

•Range

•Standard deviation

Question 8

What is the RANGE?

Answer 8

Subract lowest from highest score

Question 9

AO3: Evaluate the RANGE

Answer 9

✅️ Easy to calc

❌️ Only considers extreme scores
• No insight into data

Question 10

What is STANDARD DEVIATION?
What if smaller or larger?

Answer 10

Calc that tells how much scores deviate from mean by calcing diff between mean

Smaller= tighter spread
Peeps impacted similarly by IV

Larger= Greater spread
Peeps impacted diff by IV

Question 11

AO3: Evaluate STANDARD DEVIATION

Answer 11

✅️ More prescice than range
• All values = more representative of data

❌️ Effected by extreme values easily=
Skews final results

Question 12

What are the measures of central tendancy?

Answer 12

Measure of average values in set of data

• Mean

• Median

• Mode