(a)
The values of X if X is the (rounded) change in the Dow on a randomly selected day where the chart shows the day-by-day change, rounded to the nearest
(b)
To calculate: The frequency and probability distributions of X if X is the (rounded) change in the Dow on a randomly selected day where the chart shows the day-by-day change, rounded to the nearest
(c)
To calculate: The probability that on a randomly selected day, the Dow decreased by more than
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Finite Mathematics and Applied Calculus (MindTap Course List)
- A municipal solid-waste site for a city must be located at Site A or Site B. After sorting, some of the solid refuse will be transported to an electric powerplant where it will be used as fuel. Data for the hauling of refuse from each site to the power plant are shown in Table P2-4. If the power plant will pay $8.00 per cubic yard of sorted solid waste delivered to the plant, where should the solid-waste site be located? Use the city’s viewpoint and assume that 200,000 cubic yards of refuse will be hauled to the plant for one year only. One site must be selected.arrow_forwarda. Compute a weighted 3-month moving average forecast for months 4 through 9. Assign weights 5,3, and 1 to the months in sequence starting with the most recent month. Show your complete and step by step solution and answer.arrow_forwardGiven the number of incidents between 1 to 7 October 2021 in the table below: Date Incidents 1/10/2021 99430 2/10/2021 101786 3/10/2021 103843 4/10/2021 106318 5/10/2021 109804 6/10/2021 113381 7/10/2021 116864 Calculate the MAPE only for these 7 days and compare the forecasting accuracy of the model for this period with its fitting accuracy during the observation period.arrow_forward
- Metropolitan Hospital has estimated its average monthly bed needs, N, as: N=460+9X�=460+9� where X = time period (months); (January 2002 = 0) Assume that no new hospital additions are expected in the area in the foreseeable future. The following monthly seasonal adjustment factors have been estimated, using data from the past five years: Forecast Metropolitan's bed demand for January, April, July, November, and December 2007. Month Adjustment Factor (%) Forecast January +5 April -15 July +4 November -5 December -25 Suppose the following actual and forecast values for June bed demands have been recorded. Year Forecast Actual 2007 1,045 1,139 2006 937 974 2005 829 895 2004 721 743 2003 613 656 2002 505 515 What seasonal adjustment factor would you recommend be used in making future June forecasts? 2.1% 5.5% 1.3%arrow_forwardThe MAD for the forecast developed using a weighted 2-year moving average with weights of 0.350.35 and 0.650.65 is what?arrow_forwardassume we have a cycle-servixe level of 90%, and we deliver 4 items on a customers order, what is the overall customer service level for the order? (show work)arrow_forward
- Insurance companies can lower their risks by A) using the law of large numbers to make the number of claims more predictable. B) diversifying across insurance products. C) granting large numbers of independent risk policies. D) all of the abovearrow_forwardWhat do millennials around the world want in a job ? A Deloitte survey of millennials on work - life challenges found that millennials are looking for stability in an uncertain world , with 65 % of millennials preferring a permanent , full - time job rather than working freelance or as a consultant on a flexible or short - term basis . Source : Data extracted from " Freelance flexibility with full - time stability . " bit.ly/2pr6h9r . * Suppose you select a sample of 100 millennials . a . What is the probability that in the sample fewer than 70 % prefer a permanent , full - time job ? b . What is the probability that in the sample between 60 % and 70 % prefer a permanent , full - time job ? c . What is the probability that in the sample more than 70 % prefer a permanent , full - time job ? d . If a sample of 400 is taken , how does this change your answers to ( a ) through ( c ) ?arrow_forwardPut all iteration data on a table.arrow_forward
- Exercise 1.14 (Static) THE BANK CUSTOMER WAITING TIME CASE A bank manager has developed a new system to reduce the time customers spend waiting to be served by tellers during peak business hours. Typical waiting times during peak business hours under the current system are roughly 9 to 10 minutes. The bank manager hopes that the new system will lower typical waiting times to less than 6 minutes and wishes to evaluate the new system. When the new system is operating consistently over time, the bank manager decides to select a sample of 100 customers that need teller service during peak business hours. Specifically, for each of 100 peak business hours, the first customer that starts waiting for teller service at or after a randomly selected time during the hour will be chosen. Consider the peak business hours from 2:00 p.m. to 2:59 p.m., from 3:00 p.m. to 3:59 p.m., from 4:00 p.m. to 4:59 p.m., and from 5:00 p.m. to 5:59 p.m. on a particular day. Also, assume that a computer software…arrow_forwardTwins, again Afterreading of the JAMAstudy in Exercise 12, alarge city hospitalexamined their records oftwin births for severalyears and found the datasummarized in the tablebelow. Is there evidence that the way the hospital dealswith pregnancies involving twins may have changed?arrow_forwardUsing the time series data in the table, respond to the following items. Period Sales 1 $ 615 2 678 3 761 4 710 5 784 6 801 7 852 8 698 9 1,193 10 1,115 11 1,231 12 1,259 13 1,495 14 1,229 15 1,652 16 1,337 17 1,673 18 1,613 d-1. Compute all possible forecasts using a trend forecasting model using simple linear regression? (Round your answers to 3 decimal places.) Period Sales Predicted Sales Absolute Error 1 615 2 678 3 761 4 710 5 784 6 801 7 852 8 698 9 1,193 10 1,115 11 1,231 12 1,259 13 1,495 14 1,229 15 1,652 16 1,337 17 1,673 18 1,613 d-2. What is the MAD? (Round your answer to 3 decimal places.) d-3. What is the trend equation based on the regression analysis? (Round your answers to 3 decimal places.) Sales = __________ + _______________ time…arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillLinear Algebra: A Modern IntroductionAlgebraISBN:9781285463247Author:David PoolePublisher:Cengage Learning