(d) X = the length of a randomly selected rattlesnake Describe the set of possible values for the variable. о 0, 1, 2, 3, ... O [0, 0) O (0, 0) О 1, 2, 3, ... State whether the variable is discrete. O discrete O not discrete (e) z = the sales tax percentage for a randomly selected amazon.com purchase, where n = the total number of possible sales tax percentages for online purchases Describe the set of possible values for the variable. O [0, z,) О 1, 2, 3, ..., п O [0, n] State whether the variable is discrete. O discrete O not discrete (f) Y = the pH of a randomly chosen soil sample Describe the set of possible values for the variable.

b) Below are the no of customers, visiting a local Tesco Express, in the first week of holiday season. The store manager would like to avoid stock out in the busy period. Provide forecast of sales on Saturday next week, using 3 point moving average and seasonal variation. Assume same seasonal variation next period. 3 Point Moving Seasonal Week days Customers Average Variation Monday Tuesday Wednesday Thursday Friday Saturday Sunday (i) (ii) 1,525 1,352 1,250 1,400 1,515 1,815 1,750 Calculate daily trend, all rounded to units Calculate sales value trend in next turday, all rounded to units

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1) Identify the type and level of data the the variable of "Salary" a. Quanlitative, Nominal b. Quanlitative, Ordinal c. Quantitative, Continuous, Interval d. Quantitative, Coutinous, Ratio e. Quantitative, Discrete, Interval f. Quantitative, Discrete, Ratio 2) Identify the type and level of data the the variable of "NumEmpl" a. Quanlitative, Nominal b. Quanlitative, Ordinal c. Quantitative, Continuous, Interval d. Quantitative, Coutinous, Ratio e. Quantitative, Discrete, Interval f. Quantitative, Discrete, Ratio 3) Identify the type and level of data the the variable of "Margin" a. Quanlitative, Nominal b. Quanlitative, Ordinal c. Quantitative, Continuous, Interval d. Quantitative, Coutinous, Ratio e. Quantitative, Discrete, Interval f. Quantitative, Discrete, Ratio