Two independent random samples drawn from normal distributions have equal variances and mears 1 and 2. You are given - The sample mean from the first sample is 16:9. - The sample mean from the second sample is 22.1 . - The number of observations from both samples combined is 17. - The upper bound of the 90% confidence interval for 12 is 1.44 . Let tn, be the 100pth percentile of a t random variable with v degrees of freedom. The following table lists values of th. for specific combinations of p and : Determine the lower bound of the 95% confidence interval for 1=2. Less than =14 At least -14 , but less than -12 At least -12, but less than -10 At least - 10 , but less than -8 At least -8