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Posted: November 28th, 2022
Week 2 Assignment
1. Explain the difference between a population mean and a sample mean without using the words population, sample, or mean. Use our weekly scenario to help in your explanation.
2. Calculate the range, variance, and standard deviation in EXCEL for the SAMPLE below:
4, 2, 5, 7, 5, 12, 6, 9, 5, 6, 5, 4, 4, 4, 5, 2
3. Discuss how variance and standard deviation measure variation. Use #2 to illustrate.
4. The Empirical Rule for a normally distributed population and Chebyshev’s Theorem have the same basic purpose. In your own words, explain that purpose.
5. Calculate the range, variance, and standard deviation in EXCEL for the list of numbers in #2, but this time, instead of a sample, you are working with a POPULATION. What numbers changed? What didn’t? Explain why the numbers changed or did not change.
6. Explain the following in your own words: percentile, the first quartile, the third quartile, and the IQR (interquartile range). Use the list of numbers in #2 to find these values.
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Week 2’s homework
1. Without using the phrases population, sample, or mean, explain the difference between a population mean and a sample mean. To assist you with your explanation, use our weekly scenario.
2. In EXCEL, calculate the range, variance, and standard deviation for the following SAMPLE:
2, 5, 7, 5, 12, 6, 9, 5, 6, 5, 4, 4, 4, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3. Explain how variance and standard deviation are used to quantify variation. Use #2 as an example.
4. The underlying aim of the Empirical Rule for a normally distributed population and Chebyshev’s Theorem is the same. Explain the purpose in your own words.
5. In EXCEL, calculate the range, variance, and standard deviation for the list of numbers in #2, but this time, instead of a sample, you are working with the entire set of values.
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