How would i construct a 90 confidence interval for the mean


If a real estate agent wants to estimate the average age of those buying investment property in his area and randomly selects 15 of his clients who purchased an investment property and obtains the data shown below. The buyer ages are approximately normally distributed and the sample does not contain any outliers. How would I construct a 90?% confidence interval for the mean age for all the real estate? agent's clients who purchased investment property?

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Business Management: How would i construct a 90 confidence interval for the mean
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