Measures of central tendency and measures of dispersion

Question 1

How do you work out the mean?

Answer 1

Add all the scores up then divide by how many there are

Question 2

How do you work out the mode?

Answer 2

find the most common score

Question 3

How do you find the median?

Answer 3

Order them and then find the middle score

Question 4

strength of the mean

Answer 4

it uses all the data therefore is the most powerful

Question 5

Weaknesses of the mean

Answer 5

. slowest to work out

. Easily skewed by extreme scores

Question 6

Strengths of the mode

Answer 6

. Convenient

. Not skewed by extreme scores

Question 7

Weakness of the mode

Answer 7

. Doesn’t use all the data

Question 8

Strengths of the median

Answer 8

. Not skewed by extreme scores

Question 9

How do you find the range?

Answer 9

the highest score take away the lowest score

Question 10

How do you find standard deviation?

Answer 10

Find the difference between all the scores to the mean, add them up then divide by how many there are

Question 11

Strength of the range would be

Answer 11

out of the two measures of dispersion, it’s the most convenient

Question 12

Weaknesses of the range would be

Answer 12

. That it doesn’t use all the data

. It can be easily skewed by extreme scores

Question 13

Strength of standard devisation is

Answer 13

It uses all the data

Question 14

Weakness of standard deviation is

Answer 14

That it’s more complex to work out than the range