the length of time in years it took a random sample of 32 former smokers to quit smoking permanently are listed

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the length 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 6.3. alpha = 0.05, is there enough evidence to reject claim that the mean time it takes smokers to quit smoking permanently is 13 years? 11.7,16.8,15.3,19.3,19.1,18.3,21.5,7.8,16.5,11.6,11.3,13.2,10.7,20.6,9.6,9.1,8.1,13.9,11.1,14.9,7.9,7.1,17.9,12.8,8.3,22.1,16.2,11.6,20.8,18.4,21.1,8.4 a identify claim and state null hypothesis and alternative hypothesis b Identify standardized test statistic z=? c Find P value P=? d decide whether to reject or fail to reject the null hypothesis