Question

In: Statistics and Probability

According to a report, 64.764.7% of murders are committed with a firearm.(a) If 300300 murders are...

According to a report,

64.764.7%

of murders are committed with a firearm.(a) If

300300

murders are randomly selected, how many would we expect to be committed with a firearm?(b) Would it be unusual to observe

204204

murders by firearm in a random sample of

300300

murders? Why?

(a) We would expect

nothing

to be committed with a firearm.

(b) Choose the correct answer below.

YesYes,

because

204204

is greater than mu plus 2 sigma .greater than μ+2σ.

NoNo,

because

204204

is between mu minus 2 sigma and mu plus 2 sigma .between μ−2σ and μ+2σ.

C.Yes, because

204204

is between

mu minus 2 sigmaμ−2σ

and

mu plus 2 sigmaμ+2σ.

D.No, because

204204

is greater than

mu plus 2 sigmaμ+2σ.

E.No, because

204204

is less than

mu minus 2 sigmaμ−2σ

According to an almanac,

8080%

of adult smokers started smoking before turning 18 years old.(a) If

100100

adult smokers are randomly selected, how many would we expect to have started smoking before turning 18 years old?(b) Would it be unusual to observe

8585

smokers who started smoking before turning 18 years old in a random sample of

100100

adult smokers? Why?

(a) We would expect about

nothing

adult smokers to have started smoking before turning 18 years old.

(Type a whole number.)

(b) Would it be unusual to observe

8585

smokers who started smoking before turning 18 years old in a random sample of

100100

adult smokers?

YesYes,

because

8585

is greater than mu plus 2 sigma .greater than μ+2σ.

B.Yes, because

8585

is between

mu minus 2 sigmaμ−2σ

and

mu plus 2 sigmaμ+2σ.

NoNo,

because

8585

is between mu minus 2 sigma and mu plus 2 sigma .between μ−2σ and μ+2σ.

YesYes,

because

8585

is between mu minus 2 sigma and mu plus 2 sigma .between μ−2σ and μ+2σ.

E.No, because

8585

is less than

mu minus 2 sigmaμ−2σ.

Solutions

Expert Solution

We would expect to be committed with a firearm.

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We would expect about adult smokers to have started smoking before turning 18 years old.

orchestra answered 1 year ago

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According to a​ report, 64.764.7​% of murders are committed with a firearm.​(a) If 300300 murders are...

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