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Consider the following data drawn independently from normally distributed populations: (You may find it useful to...

Consider the following data drawn independently from normally distributed populations: (You may find it useful to reference the appropriate table: z table or t table)

x 1= 27.1 x2 = 30.3
σ12 = 89.5 σ22 = 92.3
n1 = 25 n2 = 31


a. Construct the 90% confidence interval for the difference between the population means. (Negative values should be indicated by a minus sign. Round all intermediate calculations to at least 4 decimal places and final answers to 2 decimal places.)

Math   Statistics-And-Probability   
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Answer #1

Note- The given confidence interval has been calculated considering the given standard deviation in the question to be population standard deviations and not sample standard deviation.

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