A random sample of 90 observations produced a mean = 25.9 and a standard deviation s
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A random sample of 90 observations produced a mean = 25.9 and a standard deviation s = 2.7.
a. Find a 95% confidence interval for the population mean µ.
b. Find a 90% confidence interval for µ.
c. Find a 99% confidence interval for µ.
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a For confidence coefficient 95 05 and 2 05 2 025 From Table IV Appendix A z 025 196 The confidenc...View the full answer
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