Assuming that the population is normally distributed, construct a 90% confidence interval for the population mean, based on the following sample size of n=7: 1.2, 3, 4.5, 6, and 7. In the given data, replace the value 21 with 7 and recalculate the confidence interval. Using these results, describe the effect of an outlier (that is, an extreme value) on the confidence interval, in general.Find a 90% confidence interval for the population mean, using the formula or technology. Round to two decimal
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IQ tests administered to 10,000 people resulted in an average score x̅=100.1. Assuming that IQ scores are approximately normally distributed with standard deviation σ=10, find the corresponding 99 percent confidence interval for the mean IQ. | Numerade
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