Thank you in advance. Could anyone explain why my lecturers calculation for 99% confidence intervals
Does not equate to R's function:
t.test(study$Questions, conf.level = 0.99)
data: study$Questions t = 78.112, df = 122, p-value < 2.2e-16 alternative hypothesis: true mean is not equal to 0 99 percent confidence interval: 47.36637 50.64989 sample estimates: mean of x 49.00813
Any help on this matter greatly appreciated!