23.6 Practically significant? Brook conducted a study for a clothing company to determine if a rewards program caused customers to spend more. Brook found statistically significant results, with a P-value of 0.012. The average amount spent per order before the rewards program was $100, while the average amount spent per order after the rewards program was

$223. Are these results practically significant?

a. No, because the P-value is small.

b. No, because an average increase of $123 per order is probably too small.

c. Yes, because the P-value is small.

d. Yes, because an average increase of $123 per order is more than twice the average amount spent per order before the rewards program.