A what is the point estimate of 1 - 2 round to two decimal


The following information is obtained from two independent samples selected from two normally distributed populations.

n1 = 18           x1 = 7.82        σ1 = 2.35

n2 =15            x2 =5.99         σ2 =3.17

A. What is the point estimate of μ1 - μ2? Round to two decimal places.

B. Construct a 99% confidence interval for μ1 - μ2. Find the margin of error for this estimate. Round to two decimal places.

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