The London School of Economics and the Harvard Business School have conducted studies of how chief executive officers (CEOS) spend their time. Thesestudies have found that CEOs spend many hours per week in meetings, not including conference calls, business meals, and public events (The Wall StreetJournal). Shown below is the time spent per week in meetings (hours) for a sample of 25 CEOS.2020231519a. What is the least amount of time spent per week on meetings?The highest?17 - 1819 - 2021 2223 24TotalPrepare a histogram2223141917Frequencyb. Use a class width of two hours to prepare a frequency distribution and a percent frequency distribution for the data. Round your answers to the nearestwhole number. If your answer is zero, enter "0".Hours in Meetings perweek11-1213 - 1415 - 16PercentFrequency%%%%12%%%%1813152323171215192120121721

The question is about frequency distribution.Given :

Answered: The London School of Economics and 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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You may need to use the appropriate technology to answer this question. Suppose a company surveyed the work preferences and attitudes of 1,006 working adults spread over three generations: baby boomers, Generation X, and millennials. In one question, individuals were asked if they would leave their current job to make more money at another job. The sample data are summarized in the following table. Leave Job forMore Money? Generation Baby Boomer Generation X Millennial Yes 124 155 166 No 202 186 173 Find the value of the test statistic. (Round your answer to two decimal places.) What is the p-value? (Round your answer to four decimal places.)
4. Hypothesis tests about a population proportion A firm’s corporate strategy is driven largely by its top management team. One method of gauging the influence of marketing on corporate strategy is to measure the proportion of firms with a chief marketing officer on their top management team. Over the 5-year period from 2000 to 2004, 42% of firms had a chief marketing officer on their top management team. [Source: Pravin Nath and Vijay Mahajan, “Chief Marketing Officers: A Study of Their Presence in Firms’ Top Management Teams,” Journal of Marketing, 70 (2007).] To test the hypothesis that the influence of marketing on corporate strategy today is different from its influence in the 2000–2004 period, a random sample of 53 U.S. firms is selected. Of these, 28 firms have a chief marketing officer on their top management team. The test is conducted at a significance level of α = 0.01. Let p be the true proportion of firms with a chief marketing officer currently on their top…
Is there a relation between incidents of child abuse and number of runaway children? A random sample of cities (over 10,000 population) gave the following information about the number of reported incidents of child abuse and the number of runaway children. (Reference: Federal Bureau of Investigation, U.S. Department of Justice.) City 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Abuse cases 109 50 12 97 33 88 14 55 67 57 115 106 41 26 81 Runaways 630 280 282 520 167 427 184 329 358 690 781 547 483 422 426 Use a 1% level of significance to test the claim that there is a monotone-increasing relationship between the ranks of incidents of abuse and number of runaway children. (a) Rank-order abuse using 1 as the largest data value. Also rank-order runaways using 1 as the largest data value. Then construct a table of ranks to be used for a Spearman rank correlation test. City Abuse CasesRank x RunawaysRank y d = x - y d2
13. A researcher collected data from a sample that he chose and he wishes to understand the relationship between two variables: gender and preference of school. The researcher has two categories for gender (male, female) and two categories for mode of transportation (public school, private school). He collects his data and performs a count off how many observations appeared in his data set. He found he has the actual counts in the table below after looking at his data set: Gender Public School Private School Total Male 80 30 100 Female 20 98 108 Total 100 128 208 Step 1: State the hypotheses. Step 2: The level of significance, one/two-tailed test, degrees of freedom Step 3: Statistical Test Step 4: Computation Step 5: Decision Rule Step 6: Reject Ho or Failed to Reject Ho Step 7: Conclusion.
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Ports of Entry-The maximum numbers of passenger vehicle lanes at 16 canadian boarder ports of entry. 8 6 10 3 6 11 17 2 2 6 1 10 3 19 10 5 Mean, Median, Mode of Data
ABZ research consultancy firm conducted a study of how chief executive officers (CEOs) spend their day. The study found that CEOs spend on average about 18 hours per week in meetings, not including conference calls, business meals, and public events. Shown below is the time spent per week in meeting (hours) for a sample of 25 CEOs.14 15 18 23 15 19 20 13 15 23 23 21 15 20 21 16 15 18 18 19 19 22 23 21 12a. Prepare a numerical summary report including the summary measures, mean, median, range, variance, standard deviation, and coefficient of variation, smallest and largest values, and the three quartiles. b. Use a class width of 2 hours to prepare a frequency distribution and a percentage frequencydistribution for the data. c. Prepare a histogram and comment in the shape of the distribution.
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A social media app is conducting a study on the amount of time users spend on the app. They collect the following variables. 1. Age Years: How old they are in years? 2. Income: Monthly Income 3. Location: What country do they live in? 4. Device: Do they use an iPhone, Samsung, other? 5. Service: Who provides their mobile phone service? For example: T-Mobile, At&t, Verizon, ect 6. Hours: How many hours do they spend on the app per week. Which variable could the research construct a one proportion z-interval for? And Why would you choose that variable?
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