Use the data set you collected for the Week 5 lab (heights of 10 different people plus the 10 heights provided by your instructor).

Instructor's value is: 62, 63, 64, 65, 66, 68, 68, 69, 70, 73

My value is: 70, 72, 65, 68, 67, 66, 71, 73, 64, 69

Summarize the Preliminary Calculations (Round to 2 decimal places):

Sample Mean:______

Standard Deviation:_____

Your Height: _________

Please answer the following questions in complete sentences:

1. Discuss your method of collection for the values that you are using in your study (systematic, convenience, cluster, stratified, simple random).

2. What are some faults with this type of data collection?

3. What other types of data collection could you have used, and how might this have affected your study?

Calculation of 95% Confidence Interval

1. Give a point estimate (mean) for the average height of all people at the place where you work. What is your point estimate, and what does this mean?

2. Find a 95% confidence interval for the true mean of heights. What is the interval? [Provide a Screenshotof your work from the t value Confidence Interval for from the Confidence Interval tab

3. Give a practical interpretation of the 95% confidence interval.

Calculation of 99% Confidence Interval

Now, change your confidence level to 99% for the same data.

1. Find a 99% confidence interval for the true mean of heights. What is the interval? [Provide a Screenshotof your work from the t value Confidence Interval for from the Confidence Interval tab

2. Give a practical interpretation of the 99% confidence interval.

Compare Margins of Error

1. Would the margin of error be larger or smaller for the 99% CI? Explain your reasoning.

2. As the confidence level increases, what happens to the Margin of Error?