Over the last 10 years, the average number of deaths due to accidents involving a certain commercial airline has been about 24 per year. Over the same period, the average number of passengers of the airline has been more than 4.2 million per year.
a. Can this be considered a long run or short run of trials? Explain.

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation:

you can use a^2+ b^2=c^2

it is ok do not worry about it my dude. have a good one