Quiz: Ch 2-3 Quiz- 34 questions In 2007, the mean rate of violent cime Complote

Question

Quiz: Ch 2-3 Quiz- 34 questions In 2007, the mean rate of violent cime Complote parts (a) through (d) below Approximately 95% ofthe observations fall within the interv-CID (Type whole numbers ) Type whole numbers ) O A. Yes 352 would be considered unusual because it falls within one standard deviation of the mean O D. No, 352 would not be considered unusual because it is moee than two standard deviason re mean O A. Yes, 52 would be considered unusual because it is one standard deviation below the mean O B. Yes, 52 would be considered unusoal because it is more than two standard deviations below the mean

Explanation / Answer

mu=337

std dev=100

A)

95% of observation fall in interval (mu - 2*std dev) ,(mu + 2*std dev)

={ (337 - 2*100) , ( 337+2*100) }

={137,537}

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B) 68% of observation fall in interval (mu - 1*std dev) ,(mu + 1*std dev)

={ (337 - 100) , (337+100) }

=(237, 437)

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C)

as we can ,352 fall in 1 std dev away from.so, answer is option C

No, 352 would not be considered unusual because it falls within one standard deviation of the mean.

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d)interval for 2 std dev a calculated in part a) is {137,537}

X=52

so, answer is option B

Yes, 52 would be considered unusual because it is more than two standard deviations below the mean.

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