Final Analysis

Descriptive analysis :
Sales by gender: 97% of customers were female whereas 3% of customers were male. we can conclude Females represents the largest part of customers compare to Males. Moreover, female customers spend on an average $ 22,7 more than male customers.
Sales by marital status : Married customers represents 76% of overall customers at Pelican stores. Also they tend to spend more than single customers.
Sales by age: Around 80% are between 30 years old and 60 years old. Also, customers between 50 and 60 years old spend an average $30 more than customers of a different group age.
Sales by discount and gender: Female represent the largest part of customers among promotional and regular customers. Also they tend to spend more money than male customers
Sales by discount: Promotional customers bought an average of 3.8 items, while the Regular customers bought 1.8. It is clear that promotional customers purchase more items than regular customers. Moreover, Promotional customers spend more than Regular customers. They represent
Stem and leaf plot : the stem and leaf plot shows that both Regular and Promotional customers, the most frequent amount of dollars spent is between $40 and $50. It also shows that customers with promotional coupons are more likely to spend more. Without promotional coupons the maximum amount spent was $ 160. With Promotional coupons, 7 customers spent more than $16. The maximum being $288.
Outliers : We have found a 3 outliers in the set of data, they were all among promotional customers. However, They are not really significant for our analysis. Indeed, they are only representing 3% of overall datas.

Interpretation:

After careful analysis of the data, we came to the conclusion that we should continue with our promotional coupons because not only did the number of sales items double, but the sales