Question

FQMClass2 widok chroniony - Zapisano w: ten komputer Układ Odwołania Korespondencja Recenzja Widok Pomoc O Powiedz mi, co chcesz zrobić rnetowej i moze zawierać wirusy. Jeśli nie ma konieczności jego edytowania, bezpieczniej jest pozostać w widoku chronionym. Part II (Exercises from Business Statistics; Sharpe, De Veaux, Velleman) 1. As the new manager of a small convenience store, you want to understand the shopping patterns of your customers. You randomly sample 20 purchases from yesterday's records (all purchases in U.S. dollars): 39.05, 37.91, 56.95, 21.57, 75.16, 2.73, 34.35, 81.58, 40.83, 74.30, 32.92, 64.48, 47.80, 38.24, 47.54, 47.51, 51.96, 11.72, 32.98, 65.62. a) Would you expect the mean purchase tob) Find the mean purchase. be smaller than, bigger than, or about the c) Find the median purchase. same size as the median? Explain. 2. For the data in Exercise 1 find: a) the quartiles, b) the deciles, c) the IQR d) the standard deviation, e) the coefficient of variation. 3. For the data in Exercise 1: a) Draw a boxplot. b) Use a thumb rule to identify the outliers.outliers). c) Draw a modified boxplot (if there are 4. The histogram shows the December charges (in S) for 5000 customers from one marketing segment from a credit card company. (Negative values indicate customers who received more credits than charges during the month.) a) Write a short description of this distribution (shape, center, spread, unusual features). b) Would you expect the mean or the median to be larger? Explain. c) Which would be a more appropriate summary of the center, the mean or the median? Explain.

Answer 1