1.) A machine cuts plastic into sheets that are 30 feet (360 inches) long. Assume that the population of lengths is normally distributed. Complete parts (a) and (b)

2.) In a survey of 2743 adults, 1429 say they have started paying bills online in the last year, Construct a 99% confidence interval for the population proportion. Interpret the results.

3.) The lengths of time in years it took a random sample of 32 former smokers to quit smoking permanently are listed. Assume the population standard deviation is 4.2 years. At (wont let me do symbol)=0.07 is there enough evidence to reject the claim that the mean time it takes smokers to quit permanently is 13 years? Complete parts (a) through (e)

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