Researchers have been studying the trend in Britishautomobile sales over the past few decades only torealize the significant fluctuations in the market. Ifthe increase in truck market share between the1930s and 1950s had been maintained across thestudied period and beyond, what would the marketshare of truck sales be in the 2010s?Percentage of each type5040302010Automobiles Sold in Great Britain0MotorcycleCarTruckBus16%26%36%46%56%66%76%86%1930s1950s1970s1990s

It is required to estimate the market share of truck sales in the 2010s, if the increase in truck…

Answered: Researchers have been studying the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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53. Calculate seasonal index numbers from the following data : RATIO OF OBSERVED TO TREND VALUES (%). Year II IV 2012 108 130 107 93 2013 86 120 110 91 2014 92 118 104 88 2015 78 100 94 78 2016 82 110 98 00 86 2017 X3 If the sales of goods X by a firm in the first quarter of 2018 are worth Rs. 2,00,000, determine how much worth of the goods should be kept in stock by the firm to meet the demand in each of the remaining three quarters of 2018 by using the seasonal index numbers calcuiated above. 106 118 105 98
Provide an appropriate chart for the following data
Health insurers are beginning to offer telemedicine services online that replace the common office visit. A company provides a video service that allows subscribers to connect with a physician online and receive prescribed treatments. The company claims that users of its online service saved a significant amount of money on a typical visit. The data shown below ($), for a sample of 20 online doctor visits, are consistent with the savings per visit reported by the company. 102 44 50 115 93 65 66 59 50 86 58 106 103 84 83 88 103 110 63 92 Assuming the population is roughly symmetric, construct a 95% confidence interval for the mean savings in dollars for a televisit to the doctor as opposed to an office visit. (Round your answers to the nearest cent.) X to $
Coffee is a leading export from several developing countries. When coffee prices are high, farmers often clear forest to plant more coffee trees. Here are five years’ data on prices paid to coffee growers in Columbia and the percent of forest area lost in a national park that lies in a coffee producing region: Price (cents per pound) 29 40 54 55 72 Forest lost (%) 0.49 1.59 1.69 1.82 3.10 Question: Make a scatterplot. Which one is the explanatory variable, and which one is the response variable? What kind of pattern does your plot shows?
6. Present the following data by a suitable diagram showing. The sales and net profits of a private company. Year Sales Net Profits 1998-1999 14% 49% 1999-2000 10% -25% 2000-2001 13% -1% es ehsinar wer lo
Do students with higher college grade point averages (GPAs) earn more than those graduates with lower GPAs?† Consider the following hypothetical college GPA and salary data (10 years after graduation). GPA Salary ($) 2.22 72,000 2.27 48,000 2.57 72,000 2.59 62,000 2.77 86,000 2.85 96,000 3.12 133,000 3.35 130,000 3.66 157,000 3.68 162,000 #1) Use these data to develop an estimated regression equation that can be used to predict annual salary 10 years after graduation given college GPA. (Let x = GPA, and let y = salary (in $). Round your numerical values to the nearest integer.) ŷ = #2) Find the value of the test statistic. (Round your answer to two decimal places.) #3)Find the p-value. (Round your answer to three decimal places.) p-value =
Health insurers are beginning to offer telemedicine services online that replace the common office visit. Wellpoint provides a video service that allows subscribers to connect with a physician online and receive prescribed treatments. Wellpoint claims that users of its LiveHealth Online service saved a significant amount of money on a typical visit. The data shown below ($), for a sample of 20 online doctor visits, are consistent with the savings per visit reported by Wellpoint. 93 34 39 104 84 56 56 50 40 76 49 97 93 74 73 78 90 101 51 83 Assuming the population is roughly symmetric, construct a 95% confidence interval for the mean savings for a televisit to the doctor as opposed to an office visit (to 2 decimals). 95% confidence interval: $___ to $___ per visit
The following graph shows the average grade point average for a particular college from 2004 until 2011. Average GPA 3.20 OA OC OD 3.15 3.10 3.05 3.00 2.95 2.90 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 Year Which one of the following statements is correct? A) Historically, the Average GPA of the college tends to decrease. B) There appears to be no relationship between Year and Average GPA. C) Year is the dependent variable in the graph. D) Average GPA is the dependent variable in the graph.
The idea of a large, stable middle class (defined as those with annual household incomes in 2010 between $39, 000 and $118, 000 for a family of three) is central to America’s sense of itself. The following table gives the percentage of middle-income adults in the United States from 1971 through 2011: Year 1971 1981 1991 2001 2011 Percent 61 59 56 54 51 A mathematical model giving the percentage of middle-class adults in the United States for the period under consideration is given by f(t) = −2.5t = 61.2 (0 ≤ t ≤ 4) where t is measured in decades, with t = 0 corresponding to 1971. (a) Plot the data points, and sketch the graph of f the function on the same set of axes.(b) What is the rate of change of the percentage of middle-income adults in the United States over the period from 1971 to 2011? (c) Assuming that the trend continues, what will the percentage of middle-income adults in the United States be in 2021?
The number of adult Americans who smoke continues to drop. The table contains estimates of the percentages of adults (ages 1818 and over) who were smokers in the years between 1965 and 201715.and 201715. ???? ?Year � ??????? ?Smokers � 1965 41.94 1970 37.4 1974 37.1 1978 34.1 1980 33.2 1983 32.1 1985 30.1 1987 28.8 1990 25.5 1993 25.0 1995 24.7 1997 24.7 1999 23.5 2001 22.8 2002 22.5 2004 20.9 2006 20.8 2008 20.6 2010 19.3 2012 18.1 2014 16.8 2017 14.0 According to your regression line, how much did smoking decline per year during this period, on the average? Give your answer to three decimal places. average smoking decline: percentage points
47. Given the following data : Weekly take-home pay (wages) Consumer price index Year 109.50 112.8 2012 2013 112.20 118.2 2014 116.40 127.4 2015 125.08 138.2 2016 135.40 143.5 2017 138.10 149.8 () What was the real average weekly wage for each year ? (i) In which year did the employees have the greatest buying power ? (ii) What percentage increase in the weekly wages for the year 2017 is required (if any) to provide the same buying power that the employees enjoyed in the year in which they had the highest real wages ?
The following line chart shows the daily close prices for Citigroup and Overstock.com stock prices for the last 30 days. Which stock appears to be more volatile? Stock Price $95 $85 $75 $65 $55 $45 $35 1 3 5 7 9 11 13 15 17 19 21 23 25 27 Market Day Multiple Choice O O Neither are volatile Both are volatile Overstock.com Citigroup Citigroup -Overstock

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