Question

1. A small Kiosk selling ice creams has kept a record of sales for December 2020. The sales are summarised in the following frequency distribution: Daily sales (Rand) number of days 60 -- 70 5 70 -- 80 11 80 -- 90 22 90 -- 100 13 100 -- 110 7 110 -- 120 3 Calculate the mean, the variance, standard deviation and the coefficient of variation?

          1. A small Kiosk selling ice creams has kept a record of sales for December 2020. The sales are summarised in the following frequency distribution:
Daily sales (Rand)
number of days
60 -- 70
5
70 -- 80
11
80 -- 90
22
90 -- 100
13
100 -- 110
7
110 -- 120
3
Calculate the mean, the variance, standard deviation and the coefficient of variation?

1. A small Kiosk selling ice creams has kept a record of sales for December 2020. The sales are summarised in the following frequency distribution:
Daily sales (Rand)
number of days
60 – 70
5
70 – 80
11
80 – 90
22
90 – 100
13
100 – 110
7
110 – 120
3
Calculate the mean, the variance, standard deviation and the coefficient of variation?

Added by Juan Luis H.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Teresa Wray

07/19/2022

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Step 1: We need to calculate the midpoint of each class interval. Show more…

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1. A small Kiosk selling ice creams has kept a record of sales for December 2020. The sales are summarised in the following frequency distribution: Daily sales (Rand) 60-70 70-80 80-90 90-100 100-110 110-120 number of days 5 11 22 13 7 3 Calculate the mean, the variance, standard deviation and the coefficient of variation?