A Researcher Wants to Estimate the Difference in the Means

Multiple Choice

A researcher wants to estimate the difference in the means of two populations.A random sample of 36 items from the first population results in a sample mean of 430.A random sample of 49 items from the second population results in a sample mean of 460.The population standard deviations are 120 for the first population and 140 for the second population.From this information, a 95% confidence interval for the difference in population means is _______.

A) -95.90 to 35.90
B) -85.44, 25.44
C) -76.53 to 16.53
D) -102.83 to 42.43
E) 98.45 to 125.48