Question

FULL SCREEN PRINTER VERSION BACK NEXTH An experiment investigated the effectiveness of a nicotine lozenge for subjects who wanted to quit smoking (Shilfman et al, 2002). Before the treatments began, subjects answered background questions, including how many cigarettes they smoked per day, Among the 1818 subjects in the study, the average was 22.0 per day, and the standard deviation was 10.8 ogarettes per day a. Use these sample statistics to test whether or not the population mean differs from 20 ogarettes (one pack) per day. Round the test statistic to two decimal places. Use the table to find a range for the P-value, If there is no lower limit on the pvalue, enter U for the lower imt. If there is no upper limit on the Pvalue, enter1 for the upper limit Ho: Ha: Test statistic: t <p-value pvalue is Because the o at any common significance level. msler et- Cnnann th

Answer 1

mc18 ___Sclog Claim M 420 : Ma: -२० A+२० Test statistic t o २२-२ 10.k ____igig - कपा) df =n-= कान राष्ट्राम Pvale (तराज) ___ 20.0000 pouvalue very oc p-value cool e value is less than alpha e Regect at any common leven १० -20 1: +रणे 22-20 08- __(- X- - 1.656 Ruw-2(12} 656) 2260-6508) IP-valut 01016

a loc p-value 4 0.25) Because p-value greater than oos fail to repeat Ho at £20.05 - In part (a) sample size is very large so prvature will be less so There will be strong evidence large sample size Standard essor sin be less for - This result makes sense because with larger sample sizes there is is less random sampling Variabilne and same Sample mean will be more likely to happen