# Find the best point estimate of the population mean

Based on your selected topic, evaluate the following:

o Find the best point estimate of the population mean.

o Construct a 95% confidence interval for the population mean. Assume that your data is normally distributed and ÃÆ’ is unknown. (The symbol should state that the population standard deviation is unknown. Construct a 95% confidence interval for the population mean. Assume that your data is normally distributed and ÃÆ’ is unknown. The symbol should state that population standard deviation is unknown.

• Please show your work for the construction of this confidence interval and be sure to use the Equation Editor to format your equations.

o Write a statement that correctly interprets the confidence interval in context of your selected topic.

3. Based on your selected topic, evaluate the following:

o Find the best point estimate of the population mean.

o Construct a 99% confidence interval for the population mean. Assume that your data is normally distributed and ÃÆ’ is unknown.

• Please show your work for the construction of this confidence interval and be sure to use the Equation Editor to format your equations.

o Write a statement that correctly interprets the confidence interval in context of your selected topic.

4. Compare and contrast your findings for the 95% and 99% confidence interval.

o Did you notice any changes in your interval estimate? Explain.

o What conclusion(s) can be drawn about your interval estimates when the confidence level is increased? Explain.

DATA:Age Data Option Checkup:

Mean 61.81666667

Median 61.5

Mode 69

Standard Deviation 8.924337

Range 41

Midrange 55.5

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