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The mean age when smokers first start is 13 years old with a population standard deviation...

The mean age when smokers first start is 13 years old with a population standard deviation of 1.8 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS—electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 34 smokers found that their mean starting age was 12.1 years old. Do the data support the claim at the 1% significance level?

ho=

ha=

test statistic z=

critical values=

Based on the above we choose to (Select one answer)

Accept the alternative hypotheis

Accept the null hypothesis

Fail to reject the null hypothesis

Reject the null hypothesis

The correct summary would be: (Select one answer) that the mean age smokers first start is different than 13.

There is not enough evidence to reject the claim

There is enough evidence to reject the claim

There is enough evidence to support the claim

There is not enough evidence to support the claim

Math   Statistics-And-Probability   
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