Confidence interval for population mean
Develop a 95% confidence interval for population mean, u. Suppose the population has normal distribution. A sample of 20 part-time workers had mean annual earnings of $3120 with standard deviation of $677.
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The 95% confidence interval for the mean is (-0.223, 0.988). What is the correct interpretation of this interval? There is convincing evidence that variety A has a higher mean yield.
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