How many apps? According to a website, the mean number of apps on a smartphone in the United States is 83. Assume the number of apps is normally distributed with mean 83 and standard deviation 27. Part: 0 / 2 Part 1 of 2 (a) What proportion of phones have more than 69 apps? Round the answer to four decimal places. The proportion of phones that have more than 69 apps is 0.6979 Part: 1 /2 Part 2 of 2 (b) Find the 60" percentile of the number of apps. Round the answer to two decimal places. The 60" percentile of the number of apps is

28)   A coffee machine dispenses coffee into a 12-ounce cup. The amounts of coffee dispensed into the cup are normally distributed with a standard deviation of 0.02 ounce.You can allow the cup to overfill at most 2% of the time. What is the greatest amount should you set as the mean amount of coffee to be dispensed? Round final answer to the third decimal place.

Suppose that the time required to complete a 1040R tax form is normally distributed with a mean of 100 minutes and a standard deviation of 15 minutes. What proportion of 1040R tax forms will be completed in at least 128 minutes? Round you answer to at least four decimal places.

Are Older men Shorter than younger men? According to a national mean report the theight arus men IS 69.4 Inches. In a sample Between ages 60 and 300 men 69 The mean theight was I 68.7 Inches. Public Health Officials Want to determine whether the mean theight 14 108 For alder men is less than the mean Height All adult men of population standard deviation is Use a=0.65 level of 3.42 Signifigance, and the pratue