Based on a poll, 69% of internet users are more careful about personal information when using a public wi-fi hotspot. what is the probability that among four randomly selected internet users, at least one is more careful about personal information when using a public wi-fi hotspot? how is the result affected by the additional information that the survey subjects volunteered to respond?

probability for j is 1/4

while

a is 1/6

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:

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