Step 3: Based on the significance level you chose and the type of tail, you find the critical t-statistics by either looking at a t-distribution table or use a calculator or Excel. Then, you clearly state your rejection region Step 4: You compute the t-statistic using the formula specifi...
tis thet-test statisticvalue (t = 20.88), dfis the degrees of freedom (df= 9), p-valueis the significance level of thet-test(p-value = 6.210^{-9}). conf.intis theconfidence interval(conf.int) of the mean differences at 95% is also shown (conf.int= [173.42, 215.56]) ...