The average waiting time at the checkout counter for a large ...

[RYAN BANYAN]

The average waiting time at the checkout counter for a large grocery chain is 2.45 minutes with a standard deviation of 24 seconds (0.40 minutes). Assume that the distribution of waiting time is normal. What proportion of the customers are served in between 1 minute and 2.5 minutes?

Question 2

The average SAT score for the 300 students accepted at Tiny College this year is 1050 with a standard deviation of 275 . If a random sample of 40 students is selected from this class, what is the probability that the average SAT score will be between 1060 and 1120?

[frejo]

Answer to Question 1

0.5517

Answer to Question 2

0.3595

[RYAN BANYAN]

Thanks for the timely response, appreciate it

[aruss1303]

Gracias!