Chapter 8: Q 8.1. (page 319)
The value of a statistic used to estimate a parameter is called a ______ of the parameter.
The value of a statistic used to estimate a parameter is called a point estimate of the parameter.
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A simple randoes sample is taken from a population and yields the following data for a variable of the population:
Find a point estimatate for the population mean.(i.e, the mean of the variable)
Suppose that you have obtained data by taking a random sample from a population and that you intend to find a confidence interval for the population mean, . Which confidence level, or , will result in the confidence interval giving a more accurate estimate of ?
Assume that the population standard deviation is known and decide weather use of the -interval procedure to obtain a confidence interval for the population mean is reasonable. Explain your answers.
The sample data contain outliers, and the sample size is.
Suppose that you will be taking a random sample from a population and that you intend to find a confidence interval for the population mean . Which sample size, , will result in the confidence interval giving a more accurate estimate of ?
One-Sided One-Mean t-Intervals. Presuming that the assumptions for a one-mean interval are satisfied, we have the following formulas for -level confidence bounds for a population mean :
Interpret the preceding formulas for lower and upper confidence bounds in words.
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