. A random sample consisting of the values listed below was…

. A random sample consisting of the values listed below was taken from a normally distributed population.  Assuming the standard deviation of the population is unknown, construct a 99% confidence interval for the population mean that these samples were taken from. (27.4, 26.5, 25.7, 31.4, 28.2, 21.9, 16.3, 22.7, 18.8, 34.4, 29.2, and 20.5)  

Which of the following are true assumptions underlying linea…

Which of the following are true assumptions underlying linear regression?   (1) For each value of X, there is a group of Y values that is normally distributed. (2) The means of these normal distributions of Y values all lie on the regression line. (3) The standard deviations of these normal distributions are equal.