5. Leah’s Toys guarantees to ship customer orders in 24
hours or less. The following chart contains results for five
samples of nine customer orders each:
SAMPLE SAMPLE CUSTOMER ORDERS (HOURS TO SHIP)
1 3 5 21 4 15 9 7 3 6
2 22 16 8 16 11 38 11 25 15
3 9 2 5 17 2 19 4 2 4
4 6 7 18 9 16 18 7 10
5 11 10 20 18 1 6 3 18 9
a. (**) Based on these results, estimate the p and Sp values.
b. (**) A student comments, “Time is a continuous variable. We should really be looking at the X and R values.”
Do you agree or disagree? Explain your rationale.