Question: 9.35 A random sample of size n1 = 30 is taken from a normal population with a standard deviation of 1 = 4 and mean

9.35 A random sample of size n1 = 30 is taken from a normal population with a standard deviation of σ1 = 4 and mean of ¯x1 = 65. A second random sample of size n2 = 48 is taken from a different normal population with a standard deviation of σ2 = 3 and mean of

¯x2 = 58. Find a 98% confidence interval for μ1 − μ2 .

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