Sandra B.

asked • 03/31/21

A health magazine reported that 27% of adult males smoke cigarettes.

A health magazine reported that 27% of adult meals smoke cigarettes. A competing magazine thinks this claim is false. To test this claim, they select 40 adult meals at random and record if they smoke cigarettes. They calculate a 95% confidence interval for the proportion of adult males who smoke and find it is 0.22 to 0.28.

a) what is the point estimate used to create this confidence interval?

[a] 0.22

[b] 0.28

[c] 0.26

[d] 0.25

b) what is the margin of error used to create this confidence interval?

[a] .06

[b] .03

[c] .035

[d] .055

c) based on the confidence interval, it is plausible that the true proportion of adult males who smoke cigarettes is 27%?

[a] yes

[b] no

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