Q$1$ The HnG store sells suntan cream in a small touristic island. The owner of the store is interested in about how many cases of suntan cream he should order for the next week. He uses the number of the tourists arrive the island in a week to determine the size of his suntan cream order for the next week. He recorded the following data for some past weeks.

Data analyst of that company by using simple linear regression has found estimators of demand $(hat(d{)}_t)$

Find the values of residuals and calculate mean value of those residuals.

Check normality of residuals by normal probability plot. Is it normal? Why?

$\backslash$table$[[\backslash$table$[[$Week$],[(t)$