Questions a use your calculator to compute the mean

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Questions: a) Use your calculator to compute the mean, median, range, sample standard deviation and sample variance for the six percent-returns ( Return % column ) of both stock portfolios ( do not convert the values in the returns column to decimal form ). Round your answers to 3 decimal places. Refer to page 169-170 for instructions on how to compute descriptive statistics on the TI-84/83. Returns (%) Portfolio A (Returns %) Portfolio B (Returns %) Mean Median Range Standard deviation Variance b) Compare the final values of the portfolio during the six-month period. Describe any trend or trends? c) Compare the range and the standard deviation of the six returns of both portfolios. Which stock portfolio is considered more volatile? Explain why. 4. Calories in Bagels: the average number of calories in a regular-size bagel is 240. If the standard deviation is 38 calories, compute the following using Chebyshev’s theorem: a) Find the range in which at least 75% of the data will lie. b) At least what percentage of the values will fall between 126 and 354 calories? 5. Grams of fat in McDonald’s breakfast: The following data represent the number of grams of fat in a sample of breakfast meals offered at McDonald’s. 12 23 28 31 37 15 38 31 16 11 8 17 (Source: McDonald’s Corporation) Questions: a) Identify the variable in this data set. Be specific. b) Is the variable quantitative or qualitative? _________________ c) Define the sample used in this data set. d) Define the population for the given data. e) Compute the following and round to 1 decimal place: x = __________ , s = ____________, Q1 = ___________, Median = __________ Q3=__________ 23 8 20 34

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