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mathematics
statistics for managers using microsoft excel

Questions and Answers of Statistics For Managers Using Microsoft Excel

In 44 of the 68 years from 1950 through 2018 (in 2011 there was virtually no change), the S&P 500 finished higher after the first five days of trading. In 36 out of 44 years, the S&P 500
G2 Crowd provides commentary and insight about employee engagement trends and challenges within organizations in its G2 Crowd Employee Engagement Report. The report represents the results of an
In the last quarter of 2018, 47% of U.S. smartphone owners owned an iPhone.Using the binomial distribution, what is the probability that of the next six Americans who own a smartphone surveyed,a.
The Internet has become a crucial marketing channel for business. According to a recent study, 91% of retail brands use two or more social media channels for business. If a sample of 10 businesses is
Millennial s spent a mean of $163 per month o n dining in 2018.Assume that the amount spent on dining per nth is normally distributed and that the standard deviation is $25.a. What is the probability
In 2017, the per capita consumption of soft drinks in the United States was reported to be 37.5 gallons.Assume that the per capita consumption of soft drinks in the United States is approximately
Thirty companies comprise the DJIA. How big are these companies? One common method for measuring the size of a company is to use its market capitalization, which is computed by multiplying the number
The file CD Rates contains the yields for a one-year certificate of deposit (CD) and a five-year CD for 46 banks listed for West Palm Beach, Florida on April 5, 2019.For each type of investment,
Given a normal distribution withμ, = 50 and a = 5, if you select a sample of n = 100, what is the probability that X isa. Less than 47?b. Between 47 and 49.5?c. Above 51.1 ?d. There is a 35% chance
The U.S. Census Bureau announced that the median sales price of new houses sold in January 2018 was $323,000, and the mean sales price was $382,700.Assume that the standard deviation of the prices is
According to the National Survey of Student Engagement, the average student spends about 15 hours each week preparing for classes; preparation for classes includes homework, reading and any other
According to a survey in December 2018 of Women on Boards, women hold 21.7% of director seats on U.S. corporate boards. This study also reports that 39.2% of U.S. companies have three or more female
Referring to Problem 7.18, the same survey reported that 20.9% of German companies have women directors and 80% have three or more women on the board.If you select a random sample of 200 German
The stock market in Qatar reported strong return s in the first 11 months of 2018. The population of s tocks earned a mean return of 21.19 % in 2018.Assume that the re turns for s tock s on the Q a
Forth e year 2018, the stock market in Germany had a mean return of - 12.53% in 2018. Assume that the return s for stocks on the Germ an stock market were distributed normally, with a mean of - 12.53
The file contains Credit Scores the average credit scores of people from 2,750 American cities.a. Select five different samples of n = 2, n = 5, n = 15, and n = 30.b. Compute the sample mean of
The Super Bowl, watched by close to 200 million Americans, is also a big event for advertisers. The file Super Bowl Ad Ratings contains the rating of ads that ran between the opening kickoff and the
If n = 200 and X = 50, construct a 95% confidence interval estimate for the population proportion.
An Ipsos poll asked 1,004 adults, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The results indicated that 9% of males and
Let n1 = 100, X1 = 50, n2 = 100, and X2 = 30.a. At the 0.05 level of significance, is there evidence of a significant difference between the two population proportions?b. Construct a 95% confidence
Let n1 = 100, X1 = 45, n2 = 50, and X2 = 25.a. At the 0.01 level of significance, is there evidence of a significant difference between the two population proportions?b. Construct a 99% confidence
The more costly and time-consuming it is to export and import, the more difficult it is for local companies to be competitive and to reach international markets. As part of an initial investigation
Using Table E.6, determine the lower- and upper-tail critical values for the Wilcoxon rank sum test statistic, T1 , in each of the following two-tail tests:d. Given the results in (a) through
Using Table E.6, determine the lower-tail critical value for the Wilcoxon rank sum test statistic, T1 , in each of the following one-tail tests: a. a = 0.05, n = 6, n = 8 b. a = 0.025, n = 6,
In Problem 12.29, what are the lower- and upper-tail critical values for the test statistic T1 from Table E.6 if you use a 0.05 level of significance and the alternative hypothesis is H1: M1 ≠
Brand valuations are critical to CEOs, financial and marketing executives, security analysts, institutional investors, and others who depend on well-researched, reliable information for assessments
In Problem 13.4, the percentage of .mm alcohol was used to predict wine quality (stored in Vinho Verde) For those data, SSR = 21.8677 and SST = 64.0000.a. Determine the coefficient of determination,
What is the relationship between the price of crude oil and the price you pay at the pump for gasoline? The fie Oil & Gasoline contains the price($) for a barrel of crude oil (Cushing, Oklahoma,
In Problem 14.6 on page 483, you used full-time voluntary turnover(%), and total worldwide revenue ($billions) to predict number of full-time jobs added (stored in Best Companies).a. Perform a
Using the data for Problem 16.17 concerning the number of automobiles assembled in the United States from 1999 to 2018 (stored in Auto Production),a. Fit a third-order autoregressive model to the
Using the average baseball salary from 2000 through 2019 data for Problem 16.18 (stored in MLB Salaries)a. Fit a third-order autoregressive model to the average baseball salary and test for the
In forecasting a monthly time series over a five-year period from January 2014 to December 2018, the exponential trend forecasting equation for January isTake the antilog of the appropriate
Using the yearly amount of solar power generated by utilities (in millions of kWh) in the United States from 2002 through 2018 data for Problem 16.16 on page 572 (stored in Solar Power),a. Fit a
Using the data for the number of automobiles assembled in the United States for Problem 16.17 and Problem 16.29 (stored in Auto Production),a. Perform a residual analysis for each model.b. Compute
Refer to the exponential model given in Problem 16.42.a. What is the fitted value of the series in the fourth quarter of 2018?b. What is the fitted value of the series in the first quarter of 2018?c.
The data in Target are quarterly revenues (in $millions) for Target from 2000-QI through 2019-QI.a. Do you think that the revenues for Target are subject to seasonal variation? Explain.b. Plot the
Are gasoline prices higher during the height of the summer vacation season than at other times? The file Gas Prices contains the mean monthly prices (in $/gall on) for unleaded gasoline in the United
The file Crude Oil contains the volume (in barrels) of Canadian crude oil exports by rail from January 2012 to May 2019.a. Plot the time-series data.b. Develop an exponential trend forecasting
The file Silver-Q contains the price in London for an ounce of silver (i n US$) at the end of each quarter from 2004 through 2018.a. Plot t he data.b. Develop an exponential trend forecasting
What are the advantages and disadvantages of using expected monetary value (EMV) as compared to the return-to-risk ratio (RTRR)?
Many factors affect attendance at Major League Baseball (MLB) games. Among the factors are those relating to the capacity of the stadium, how the team performed during the season, and characteristics
The file Travel and Tourism contains 2018 travel and tourism industry data for a sample of 28 European countries. Variables included are travel and tourism jobs (in thousands), nights spent by
As a consultant to an investment company trading in various currencies, you have been assigned the task of studying long-term trends in the exchange rates of the Canadian dollar, the Japanese yen,
Teachers' Retirement System of the City of New York offers several types of investments for its members. Among the choices are investments with fixed and variable rates of return. There are several
The file McDonalds contains the gross revenues (in billions of current dollars) of McDonald's Corporation from 1975 through 2018:a. Plot the data.b. Compute the linear trend forecasting equation.c.
The monthly commercial and residential prices for natural gas (dollars per thousand cubic feet) in the United States from January 2008 through May 2019 are stored in Natural Gas.For the commercial
The U.S. Department of Labor gathers and publishes statistics concerning the tabor market. The file Workforce contains the size of the U.S. civilian noninstitutional population of people 16 years and
The file Gold contains the price in London for an ounce of gold (in US$) at the end of each quarter from 2004 through 2018.a. Plot the data.b. Develop an exponential trend forecasting equation with
If n = 400 and X = 25, construct a 99% confidence interval estimate for the population proportion.
Personal data are the new currency of the digital economy. How do consumers feel about sharing personal data with their communication service providers (CSPs)? A recent IBM report highlights that 40%
CarMD reports that the mean repair cost of a Toyota in 2018 for a "check engine" light was $482.Suppose a sample of 100 "check engine" light repairs completed in the last month was selected. The
A study found that 51 children who watched a commercial for Walker Crisps ( potato chips) featuring a long-standing sports celebrity endorser ate a mean of 36 grams of Walker Crisps as compared to a
Do upload and download speeds vary between cities and Internet service providers? The file Internet Provider Speeds contains the upload and download speeds in Mbps in 40 different cities for four
Do upload and download speeds vary between cities and Internet service providers? The file Internet Provider Speeds contains the upload and download speeds in Mbps in 40 different cities for four
If you have samples of n1 = 12 and n2 = 15, in performing the pooled-variance t test, how many degrees of freedom do you have?
What is meant by a p-value?
What is the difference between a one-tail test and a two-tail test?
The worldwide market share for the Chrome web browser was 69.52 % in March 2019.Suppose that you decide to select a sample of 100 students at your university and you find that 60 use the Chrome web
A growing share of Americans use smartphones as their primary means of online access at home. A survey of U.S. adults found that 58% of the 18- to 29-year-olds, 47% of the 30- to 49 year-olds, 27% of
Even though there has been an abundance of digital and analytics transformations occurring across the business landscape in recent years, few companies report achieving successful results. What has
The MSCI 2018 Survey of Women on Boards showed that there continues to be a slow increase in the overall percentage of women on boards globally. The study reported that 72 of 72 (100%) French
What is the upper-tail critical value from the chi-square distribution if you use the Kruskal-Wallis rank test for comparing the medians in six populations at the 0.01 level of significance?
Under what conditions should you use the x2 test to determine whether there is a difference between the proportions of two independent populations?
Under what conditions should you use the x2 test to determine whether there is a difference among the proportions of more than two independent populations?
Starbucks Coffee Co. uses a data-based approach to improve the quality and customer satisfaction of its products. When survey data indicated that Starbucks needed to improve its package-sealing
You are using exponential smoothing on an annual time series concerning total revenues (in $millions). You decide to use a smoothing coefficient of W = 0.20, and the exponentially smoothed value for
A sports statistician seeks to evaluate NBA team statistics for a recent year. The statistician collects data for wins and points scored, field goal percentage, opponent field goal percentage,three
The data below, stored in Computer Usage represent the hours per day spent by American desktop and laptop users from 2008 to 2017.a. Plot the time series.b. Fit a three-year moving average to the
How have stocks performed in the past? The following table presents the data stored in Stock Performance, which show the performance of a broad measure of stock performance (by percentage) for each
Gross domestic product (GDP) is a major indicator of a nation's overall economic activity. It consists of personal consumption expenditures, gross domestic investment, net exports of goods and
The data in Federal Receipts represent federal receipts from 1978 through 2018 in billions of current dollars, from individual and corporate income tax, social insurance, excise tax, estate and
The file House Sales contains the number of new, single-family houses sold in the United States from 1992 through 2018.a. Plot the data.b. Compute a linear trend forecasting equation and plot the
The average salary of Major League Baseball players on opening day from 2000 to 2019 is stored in MLB Salaries and in the following table.a. Plot the data.b. Compute a linear trend forecasting
The data shown in the following table and stored in Solar Power represent the yearly a mount of solar power generated by utilities (in millions of kWh) in the United States from 2002 through 2018:a.
The file Auto Production contains the number of automobiles assembled in the United States (in thousands) from 1999 to 2018.a. Plot the data.b. Compute a linear trend forecasting equation and plot
What are the major categories of business analytics?
Explain the difference between explanatory and prediction models.
What prevented the widespread adoption of business analytics in the past?
What is artificial intelligence, and what is its relationship to machine learning?
What is text analytics relationship to clustering and association methods?
How does clustering differ from association analysis?
How do dashboards enable business analytics users to explore data?
How are decision criteria used in decision rules?
What are the two main approaches in prescriptive analytics?
Churn occurs when customers stop doing business with a company or stop subscribing to a service. The file Bank Churn Study contains data from a churn study conducted by an international bank.For each
Wally's Discount Stores sell basic essentials for food, home, health, apparel, and home. Wally's produces and sells private-label goods under its ShowGo label in addition to select nationally
What is meant by "data dimensionality?"
What are the advantages and disadvantages of a payoff table as compared to a decision tree?
What are the advantages and disadvantages of using expected monetary value (EMV) as compared to the return-to-risk ratio (RTRR)?
What are the advantages and disadvantages of a payoff table as compared to a decision tree?
What is the difference between an event and an alternative course of action?
Recently, Ashland MultiComm Services has been criticized for its inadequate customer service in responding to questions and problems about its telephone, cable television, and Internet services.
What is the difference between a drill-down and a slicer?

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