In this item, we have the mean incubation period of 23 days and the standard deviation is 22 days. We use z-score to determine the unknown in each of the items.

(a) less than 21 days.
z-score = (23 - 21) / 22 = 1/11
This translates to a percentage of 53.6%

(b) z-score for 19 days.
z-score = (23 - 19) / 22 = 2/11
This translates to a percentage of 57.2%.

z-score for 23 days.
z-score = (23 - 23)/ 22 = 0
This translates to a percentage of 50%.

The difference between the two numbers is only 7.2%

(c) z-score of 25.
z-score = (23 - 25)/ 22 = -1/11
This translates to a percentage of 42.3%.

Then, subtract this value from 100 to give us the final answer of 57.2%.

5 0

4 years ago

your dad tells you he will pay you 6 dollars a hour for the six seconds it takes you to wash your hands before dinner. How much

Lostsunrise [7]

You made 2 cents if you round down

3 0

4 years ago

How many numbers from 0 to 199 have 3 factors Pls Help

sweet-ann [11.9K]

There are 6 numbers from 0 to 199 who have 3 factors. These numbers are:-