Question

BOXPLOTS AND WHISKERS
Scenario:
You work for the Medical Center's retail division. This division is responsible for managing the
sales and rentals of products from the gift shops, cafes, cafetrias, and medical equipment
rentals. You've been asked by the Director to undertake initiatives to boost sales at the gift
shops. You've worked with the Marketing Department to produce a couple of posters to
strategically place throughout the system. You're expected to create a boxplot & whiskers
diagram for each scenario (sales without posters & sales with posters).
Gift Shops	Sales w/o Posters	Sales w/Posters
218	215	240
224	180	220
236	150	190
252	180	175
270	201	220
282	207	215
292	195	219
304	180	295
Please provide your interpretation of the results. For example, you might want to compare the two
diagrams and point out the similarties and differences. You may want to share some relevant descriptive
statistics about the two groups of data.

Answer 1

For better understanding I have shown the steps to find the median and quartiles and then drawn the boxplot using them

Sales w/o Posters  

Sales w/Posters

Comparing the two boxplot we see

That the sales has improved with display of poster.
The median value for sales without poster was 188.5 but with with poster it has increased to 221.75

Also without poster ther max sale was 215 but with poster it has scaled upto 295.

The min sales with poster is 175 with is considerable more than the min sales without poster.