Question

A study found that the mean amount of time cars spent in​ drive-throughs of a certain​ fast-food restaurant was 158.8 seconds. Assuming​ drive-through times are normally distributed with a standard deviation of 30 ​seconds, complete parts​ (a) through​ (d) below.What is the probability that a randomly selected car will get through the​ restaurant's drive-through in less than 114 ​seconds? The probability that a randomly selected car will get through the​ restaurant's drive-through in less than 114 seconds is nothing. ​(Round to four decimal places as​ needed.) ​(b) What is the probability that a randomly selected car will spend more than 196 seconds in the​ restaurant's drive-through? The probability that a randomly selected car will spend more than 196 seconds in the​ restaurant's drive-through is nothing. ​(Round to four decimal places as​ needed.) ​(c) What proportion of cars spend between 2 and 3 minutes in the​ restaurant's drive-through? The proportion of cars that spend between 2 and 3 minutes in the​ restaurant's drive-through is nothing. ​(Round to four decimal places as​ needed.) ​(d) Would it be unusual for a car to spend more than 3 minutes in the​ restaurant's drive-through?​ Why? The probability that a car spends more than 3 minutes in the​ restaurant's drive-through is nothing​, so it ▼ would would not be​ unusual, since the probability

Answer 1