. Prepare a scatter diagram for each of these data sets and then express in words the apparent relationship between the two variables. Put the first variable on the horizontal axis and the secondvariable on the vertical axis.a. Age 24 30 22 25 33 27 36 58 37 47 54 28 42 55Absenteeism rate 6 5 7 6 4 5 4 1 3 2 2 5 3 1

Pls answer b and c

From the following time series data of sale project the sales for the next three years. Year 2001 2002 2003 2004 2005 2006 2007 Sales (*000 units) 80 90 92 83 94 99 92

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Side-by-side box plots are typically a good way to begin the analysis when comparing two populations. a. True   b. False

Consider the following sales data for Bell, Inc. Month Sales ($ Millions) Jan. 10 Feb. 12 March 14 April 16 May 18 June 23 July 26 Aug. 31 Sept. 27 Oct. 18 Nov. 16 Dec. 14 a. Use a three-month weighted moving average to forecast the sales for the months April through December. Use weights of (3/6), (2/6), and (1/6), giving more weight to more recent data. b. Use exponential smoothing with α = 0.30 to forecast the sales for the months April through December. The forecast for January was $12 million. c. Compare the performance of the two methods by using the bias and MAD as the performance criteria. Which performance method is the most reasonable? Why?

Suppose these data show the number of gallons of gasoline sold by a gasoline distributor in Bennington, Vermont, over the past 12 weeks. Sales (1,000s of gallons) Week 1 17 2 21 3 19 23 5 18 6 16 7 21 8 19 9 23 10 21 11 16 12 23 (a) Using a weight of - for the most recent observation, for the second most recent observation, and - for third most recent observation, compute a three-week weighted moving average for the time series. (Round your answers to two decimal places.) Time Series Value Weighted Moving Average Forecast Week 1. 17 2 21 19 4 23 5 18 6 16 7 21

Consider the following time series data. Quarter Year 1 Year 2 Year 3 1 4 6 7 2 2 3 6 3 3 5 6 4 5 7 8 a. Construct a time series plot. What type of pattern exists in the data? Trend Pattern Seasonal Pattern Horizontal Pattern O Trend and Seasonal Pattern Question 11 5 pts b. Create the following dummy variables: Qtr1 = 1 if quarter 1, 0 otherwise; Qtr2 = 1 if quarter 2, 0 otherwise; Qtr3 = 1 if quarter 3, 0 otherwise. Create a variable t such that t = 1 for quarter 1 of year 1, t = 2 for quarter 2 of year 1, ..., t = 12 for quarter 4 of year 3. Use these dummy variables and t to develop an estimated regression equation to account for seasonal effects and any linear trend in the data. What is the forecast for quarter 1 of next year?

Descriptive statistics for the closing stock prices of two companies for several trading periods are shown below. Baba, Inc Maman, Inc. Mean 4.00 Mean 15.91 Standard Error 0.11 Standard Error 0.29 Median 3.92 Median 16.59 Mode 4.19 Mode 15.58 Standard Deviation 1.12 Standard Deviation 3.21 Sample Variance 1.25 Sample Variance 10.31 Kurtosis -1.15 Kurtosis 3.52 Skewness 0.08 Skewness -2.09 Range 3.95 Range 13.45 Minimum 2.03 Minimum 5.55 Maximum 5.98 Maximum 18.99 Sum 436.32 Sum 1972.61 Count 109 Count 124 Which company's stock price has a more dispersed distribution? Maman, Inc. Baba, Inc.

Make a scatter plot and find Correlation coefficient between the sales and expenses from the data given: