Question about hypothesis testing

Reference no: EM13110788

1. A doctor suspected that smokers between 40 and 50 with lung disease had been smoking on average more than 20 years. A sample of 10 smokers gave the following results:

Using a 1% significance level is there sufficient evidence to justify the doctors belief?

Is there sufficient evidence to Justify it at the  = .1 level?

Normality assumed

Reference no: EM13110788

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