The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.887 g and a standard deviation of 0.319 g. The company that produces these cigarettes claims that it...


The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of<br>0.887 g and a standard deviation of 0.319 g. The company that produces these cigarettes claims that<br>it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 36<br>cigarettes with a mean nicotine amount of 0.791 g.<br>Assuming that the given mean and standard deviation have NOT changed, find the probability of<br>randomly seleting 36 cigarettes with a mean of 0.791 g or less.<br>P(M < 0.791 g) =<br>Enter your answer as a number accurate to 4 decimal places. NOTE: Answers obtained using exact z-<br>scores or z-scores rounded to 3 decimal places are accepted.<br>Based on the result above, is it valid to claim that the amoutn of nicotine is lower?<br>O No. The probability of obtaining this data is high enough to have been a chance occurrence.<br>O Yes. The probability of this data is unlikely to have occurred by chance alone.<br>

Extracted text: The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.887 g and a standard deviation of 0.319 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. The supporting evidence consists of a sample of 36 cigarettes with a mean nicotine amount of 0.791 g. Assuming that the given mean and standard deviation have NOT changed, find the probability of randomly seleting 36 cigarettes with a mean of 0.791 g or less. P(M < 0.791="" g)="Enter" your="" answer="" as="" a="" number="" accurate="" to="" 4="" decimal="" places.="" note:="" answers="" obtained="" using="" exact="" z-="" scores="" or="" z-scores="" rounded="" to="" 3="" decimal="" places="" are="" accepted.="" based="" on="" the="" result="" above,="" is="" it="" valid="" to="" claim="" that="" the="" amoutn="" of="" nicotine="" is="" lower?="" o="" no.="" the="" probability="" of="" obtaining="" this="" data="" is="" high="" enough="" to="" have="" been="" a="" chance="" occurrence.="" o="" yes.="" the="" probability="" of="" this="" data="" is="" unlikely="" to="" have="" occurred="" by="" chance="">

Jun 02, 2022
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