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A random sample of 49 measurements from one population had a sample mean of 10, with...

A random sample of 49 measurements from one population had a sample mean of 10, with sample standard deviation 3. An independent random sample of 64 measurements from a second population had a sample mean of 12, with sample standard deviation 4. Test the claim that the population means are different. Use level of significance 0.01.
(c) Compute

x1 − x2.

x1 − x2 =

Compute the corresponding sample distribution value. (Test the difference μ1 − μ2. Round your answer to three decimal places.)

(g) Find a 95% confidence interval for

μ1 − μ2.

(Round your answers to two decimal places.)

lower limit    
upper limit    
math   Statistics-And-Probability   
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