Research Method: Data analysis

Question 1

What are the three types of measure of central tendency?

Answer 1

mode

median

mean

Question 2

What are the two measures of dispersion?

Answer 2

range

standard deviation

Question 3

What is a measure of dispersion?

Answer 3

it informs us how spread out a set of scores are.

Question 4

Define standard deviation.

Answer 4

a measure of the variation in a set of scores.

Question 5

What is the advantage of working out the mode?

Answer 5

helps to indicate a ‘usual’ figure

Question 6

What is the disadvantage of a mode?

Answer 6

It is unrepresentative a sit doesn’t take into account all the scores.

Question 7

What it the advantage of working out the median?

Answer 7

it is unaffected by extreme values

Question 8

What is a disadvantage of the median?

Answer 8

with lots of scores it can be very time consuming.

Question 9

What is an advantage of working out the mean?

Answer 9

it is very representative as it uses every score.

Question 10

What is a disadvantage of the mean?

Answer 10

the mean number may not match any of the values in the actual data set.

Question 11

What is an advantage of the range?

Answer 11

easy to caculate

Question 12

What is a disadvantage of the range?

Answer 12

can be affected by extreme values

Question 13

What is an advantage of standard deviation?

Answer 13

each score is taken into account

Question 14

What is a disadvantage of standard deviation?

Answer 14

complicated to work out

Question 15

What is an advantage of bar charts?

Answer 15

you can visually compare the difference of the IV

Question 16

What is a positive skew?

Answer 16

this is where most of the distribution in concentrated towards the left of the graph, resulting in a long tail on the right.

Question 17

What is a negative skew?

Answer 17

a negative skew is where most of the distribution is concentrated towards the right of the graph, resulting in a long tail on the left.