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Sep
Interval Estimate Of A Population Mean. Either or both of these conditions are satisfied. The general format of a confidence interval estimate of a population mean is. The Interval Estimation technique can be used to arrive at this estimate at some specified confidence level. The point estimate for the population mean is 3 hrs the sample mean x.
Chapter 8 Confidence Interval One Population Section 81 - Estimating a Population Mean. A confidence interval estimate for the population mean µ is an interval of values computed from the sample data for which we can be quite confident that it contains the populations mean. In our work with confidence intervals for estimating a population mean µ we require the population standard deviation σ to be known. Either or both of these conditions are satisfied. Chapter 8 Confidence Interval One Population Section 81 - Estimating a Population Mean. Comment on why one interval is longer than the other.
Chapter 8 Confidence Interval One Population Section 81 - Estimating a Population Mean.
In this formula x j is the sample mean s j is the sample standard deviation and n. Construct a 95 confidence interval for the population mean μ. Let us denote the 100 1 α2 percentile of the standard normal distribution as zα2. However in some situations especially when a lot of research has been done on the quantitative variable whose mean we are estimating such as IQ height weight scores on standardized tests it is reasonable to assume that σ is known. Chapter 8 Confidence Interval One Population Section 81 - Estimating a Population Mean. The general format of a confidence interval estimate of a population mean is.