What critical value t∗ should be used when constructing a 98% confidence interval for μ using a SRS of size 96?
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What critical value t∗ should be used when constructing a 98% confidence interval for μ using a SRS of size 96?
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- What is the critical value needed to compute the margin of error for a confidence interval for \muμ with confidence level C = 99%?What critical value t^*t∗ should be used when constructing a 99% confidence interval for \muμ using a SRS of size 96?Find the critical value zc that corresponds to an 80% confidence level.
- Find the critical value zα/2 that corresponds to a 91% confidence level.What value of z-alpha/2 is used in a 90% confidence interval for the population mean?A random sample of 50 roundtrip flights between New York and Chicago has an average airfare of $400 with a sample standard deviation of $50.0. The critical value for an 95% confidence interval around this sample mean is ________.
- Find the critical value, t c, used for a 97% confidence interval for the mean with a sample size of 33. Round to three decimal places. Provide the positive critical value.Find the critical value used for a 95% confidence interval for standard deviation from a sample of 22. Round to two decimal places and give the right and left critical values.Stainless steels can be susceptible to stress corrosion cracking under certain conditions. A materials engineer is interested in determining the proportion of steel alloy failures that are due to stress corrosion cracking. In the absence of preliminary data, what is the minimum sample size required to ensure a 95% confidence interval for p to within 0.02?