Statististics Technology assignments weeks 1-7

Statistics Technology assignment

WEEK 5:

Confidence Intervals - Filtered cigarettes are allegedly healthier than nonfiltered cigarettes.  One reason for this is because they contain less tar.

Download the data set “Cigarette Contents” in your preferred technology format (StatCrunch, Statdisk, Excel).  Column 1 denotes the amount of tar per cigarette (milligrams) in king-sized cigarettes that are nonfiltered.  Column 4 denotes the amount of tar per cigarette (milligrams) in menthol cigarettes that are filtered. 

Using technology (StatCrunch, Statdisk, or Excel) compute a 95% confidence interval for the mean amount of tar in each cigarette group and paste the screen printouts obtained from the technology.  Post an image of your technology output using the Insert/Edit Image feature (no attachments!)  Describe in words what each confidence intervals represents.  

Compare the confidence intervals obtained for the filtered and nonfiltered cigarettes.  Based on your confidence intervals, do you see evidence that the filtered cigarettes are healthier?  Explain.

KING TARKING NICOTINEKING COMENTH TARMENTH NICOTINEMENTH CO100 TAR100 NICOTINE100 CO

201.116161.11550.44

271.716130.817161.019

271.716161.019171.217

201.11690.99130.818

201.116140.817130.818

241.417130.817141.013

201.116120.815151.117

231.415140.817151.115

201.016140.915151.115

221.214130.81790.812

201.116130.817130.818

201.116161.215130.817

201.116130.817130.818

201.116130.817151.016

201.116181.31820.23

101.81490.711151.118

241.616191.418151.015

201.11620.23130.818

211.214130.817141.015

251.518141.014150.917

231.315140.815161.115

201.116150.822151.115

221.314161.21670.67

201.11660.67171.316

201.11680.79151.114