Assume the hold time of callers to a cable company is normally distributed with a mean of 2.6 minutes and a standard deviation of 0.9 minute. Determine the percent of callers who are on hold at least 1.1 minute .

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can i see the following ?

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hello,

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

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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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left be aligning the decimal points is required to not required see the number of digits to the right