Question 1: Construct a 95% confidence interval for the mean difference µd using a sample of paired data for which summary statistics are given. Assume the parent populations are normally distributed. Assume the sample mean difference d = 3.0, the sample standard deviation sd = 2.911, and n = 8.
Question 2: True or False
One-way Analysis of Variance uses a F test to compare the variance between the treatment level means to the error variance (the pooled variance within levels). For this test, one assumption is that the observations are random samples drawn from normally distributed populations with unequal variances.
Question 3: True or False
If a linear correlation coefficient (Pearson correlation) is -0.8443 for data suitable for simple linear regression, then the slope of the simple linear regression line must be negative and the r-squared value is 0.8443.