A $95\%$ confidence interval for $\mu_1 - \mu_2$ is $(-4.2, 1.6)$. Which claim is best supported by this interval?
Question 2
A $95\%$ confidence interval for $\mu_1 - \mu_2$ is $(2.1, 7.8)$. What conclusion is most appropriate?
Question 3
A student says, “The $95\%$ confidence interval for $\mu_1 - \mu_2$ is $(-1.5, 3.0)$, so the two population means are definitely equal.” Which response is best?
Question 4
A $90\%$ confidence interval for $\mu_1 - \mu_2$ is $(5, 11)$. Which claim about a difference of means is supported?
Question 5
A confidence interval for $\mu_1 - \mu_2$ is $(-8.4, -1.2)$. What is the best interpretation?
