A survey of pet owners found that on average they spend $1,225 annually per per with a standard deviation of $275 between which two amounts would you expect 95% of the surveys respondents to spend annually per pet if the same sample is approximately normal distributed population

Question

Rudy Cain

Mathematics

15 November, 15:38

A survey of pet owners found that on average they spend $1,225 annually per per with a standard deviation of $275 between which two amounts would you expect 95% of the surveys respondents to spend annually per pet if the same sample is approximately normal distributed population

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Answers (1)

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Kyle Yang · Answer 1

I am going to try and make this as easy as possible. X=mean, s=standard deviation

This is the Empirical Rule, it states that 95% of the population is within 2 standard deviations either way of the mean.

So, to solve, find the first equation that has a 2 in it. Plug in the values that the problem gives for mean and st. dev. Next, do the same to the other equation that has the other 2 in it. This will give you your two values that you need for the answer.

Answer is B