statistics in research methods

Question 1

strength of mean

Answer 1

-most reprasentative of all measures of central tendancy because it is comprised of whole data set

Question 2

weakness of mean

Answer 2

-most sensitive measures as outliers can distort the mean
-only used with ordinal and interval data

Question 2

strength of median

Answer 2

-not distorted by extreme scores

Question 3

weakness of median

Answer 3

-doesnt reflect all the scores in the data set

Question 4

strength of mode

Answer 4

-not distorted by extreme scores
-can be used with nominal data (only one which can be)

Question 5

weakness of mode

Answer 5

-there can be more than one so not always a useful measure of central tendancy

Question 6

central tendancy

Answer 6

lets us know what is normal/ average

Question 7

measure of dispersion

Answer 7

-measures of spread

Question 8

strength of range

Answer 8

-easy to calculate

Question 9

weakness of range

Answer 9

-includes extreme values
-not taken all values into acount, not indicate distribution patterns across whole data set

Question 10

strength of standard deviation

Answer 10

-precise measurement of dispersion because all data values are included

Question 11

weakness of standard deviation

Answer 11

-distorted by extreme values

Question 12

bar charts

Answer 12

-used to show frequency of discrete data

Question 13

histogram

Answer 13

-continous data, bars touching

Question 14

what indicates a positive skew

Answer 14

mode<med<mean, negative is opposite

Question 15

what does a positive skew mean (test)

Answer 15

-most people got low scores
-test was too difficult