1. The Boeing 727 airliner carries 200 passengers and has doors with a height of 72 inches. Heights of men are normally distributed with a mean of 69.5 inches and a standard deviation of 2.4 inches. a) If a male passenger is randomly selected, find the probability that he can fit through the doorway without bending. b) If half of the 200 passengers are men, find the probability that the mean height of the 100 men is less than 72 inches.

ian gone lie this got me confused

step-by-step explanation:

addition

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;