Question

1- The mean incubation time of fertilized eggs is 19 days. Suppose the incubation times are approximately normally distributed with a standard deviation of 1 day.

​Q: The incubation times that make up the middle 39​% are ____ to ____ days.

​(Round to the nearest whole number as needed. Use ascending​ order.)

2- A study found that the mean amount of time cars spent in​ drive-throughs of a certain​ fast-food restaurant was

141.7 seconds. Assuming​ drive-through times are normally distributed with a standard deviation of 27 ​seconds.

Q: The probability that a car spends more than 3 minutes in the​ restaurant's drive-through is ____​, so it(would, would not be)​ unusual since the probability is(less, greater) than 0.05.

​(Round to four decimal places as​ needed.)

Answer 1