A small hair salon in Denver, Colorado, averages about 30 customers on weekdays with a standard deviation of 6. It is safe to assume that the underlying distribution is normal. In an attempt to increase the number of weekday customers, the manager offers a $2 discount on 5 consecutive weekdays. She reports that her strategy has worked since the sample mean of customers during this 5 weekday period jumps to 35.
Do you feel confident that the manager's discount strategy has worked?
A. No, there is only a small chance (less than 5%) of getting 35 or more customers without the discount.
B. Yes, there is only a small chance (less than 5%) of getting 35 or more customers without the discount.
C. No, there is a good chance (more than 5%) of getting 35 or more customers without the discount.
D. Yes, there is a good chance (more than 5%) of getting 35 or more customers without the discount.
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