a survey of 20 resident visitors on the average frequency of their visits per quarter to the gardens yield the sample

1

1

1

1

2

2

2

2

3

3

3

4

4

4

4

5

5

5

6

it was discovered that one o the surveyed results was misplaced

a)determine the following quantities for the sample of 20 frequencies. comment on any assumptions used and show detailed working.

mode

median

mean

inter-quartile range

standard deviation

B)it was later discovered that the missing frequency was 59. comment on how the estimates in q1a would be affected when this recovered frequency is included in the calculation. calculate the updated quantities.

c)comment on which measures would now be more appropriate when this new recorded frequency is used and why