Reference no: EM13947707
1. A sample of the longest running shows on Broadway shows they had runs lasting the following number of years. Calculate the mean, median, mode, range, variance, and standard deviation in years.
9 4 4 13 7 6 3
2. Construct a frequency distribution and a frequency histogram of the following data:
Commuting Distance (One-Way) for Thirty-Two Workers (Miles)
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13
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7
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10
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3
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15
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40
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11
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8
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4
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62
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15
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31
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17
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26
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8
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19
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10
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3
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21
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1
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16
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28
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24
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17
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12
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6
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19
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28
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35
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11
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16
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21
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3. Construct the 90%and 99% confidence interval for the population mean of the following data. Which is wider?
A computer manufacturer wants to estimate the mean number of hours per day all adults use computers at home. In a random sample of 21 adults, the mean length of time a computer was used at home was 1.7 hours. From past studies the company assumes sigma is 0.6 hour and that the population of times is normally distributed.
4. The proportion of middle managers leaving large IT companies within three years is to be estimated within 3 percent. The 0.95 degree of confidence is to be used. A study conducted several years ago revealed that the percent of managers leaving within three years was 21. To update this study, how many managers' files should be analyzed?
A. 511
B. 623
C. 709
D. 895
5. Tax Cuts or Entitlements? An economist believes that the distribution of opinions of US adults about whether tax cuts or entitlements is more important is different than the following:
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Favor
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Percentage
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Entitlements
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77%
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Tax Cuts
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15%
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Unsure
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8%
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TOTAL
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100%
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The economist conducts a survey. She randomly selects 600 adults and asks "which is more important, keeping Medicare, Social Security and Medicaid (entitlements) or tax cuts". The results follow: At alpha= 0.01, are the distributions different?
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Survey Results
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Response
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Frequency.f
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Keeping Medicare, Social Security, and Medicaid
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431
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Tax Cuts
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107
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Unsure
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62
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TOTAL
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600
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6. A researcher wants to determine if a relationship exists between job status (full- or part-time) and two different work arrangements - contract and traditional. The results of a random sample of 884 workers are shown in the following contingency table: Can the researcher use this sample to test for independence using a Chi-Square independence test? Why or why not?
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Work Arrangement
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Status
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Contract
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Traditional
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Full-time
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12
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720
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Part-time
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4
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148
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7. A travel consultant wants to determine whether certain desirable travel features are related to the travel purpose. A random sample of 300 travelers is selected and each is asked for their primary travel feature. The results are shown in the contingency table below. Assuming that the variables travel feature and travel purpose are independent, find the expected frequency for each cell.
a. Calculate the marginal (row and column) frequencies.
b. Determine the sample size.
c. Use the appropriate formula to find the expected frequency for each cell.
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Travel Feature
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Travel Purpose
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Hotel Rooms
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Leg Room on Planes
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Rental Car Size
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Other
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Business
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36
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108
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14
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22
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Leisure
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38
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54
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14
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14
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8. An HR manager is concerned about absenteeism. She decides to sample the records to determine if absenteeism is distributed evenly throughout the six-day workweek. The null hypothesis to be tested is: Absenteeism is distributed evenly throughout the week. The 0.01 level is to be used. The sample results are:
What is the calculated value of chi-square?
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WACC for the last dollar raised to complete the expansion
: Klose Outfitters Inc. believes that its optimal capital structure consists of 30% common equity and 70% debt, and its tax rate is 40%. Klose must raise additional capital to fund its upcoming expansion. The firm will have $1 million of retained earni..
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Assignment, interview a hospital administrator
: Refer to the "Collaborative Learning Community: Analysis of an Ethical Dilemma" resource for the dilemmas and resources that will be used for this multi-part Analysis of an Ethical Dilemma assignment. Part Two is an individual assignment that will..
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Bond-yield-plus-judgmental-risk-premium approach
: The earnings, dividends, and common stock price of Shelby Inc. are expected to grow at 5% per year in the future. Shelby's common stock sells for $22.00 per share, its last dividend was $2.40, and the company will pay a dividend of $2.52 at the end o..
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Natural convection between the person and room
: The exposed surface of a person in the room may be assumed to be at a tempera- ture of 32°C throughout the year and to have an emis- sivity of 0.90. The coefficient associated with heat transfer by natural convection between the person and the roo..
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What is the calculated value of chi-square
: The proportion of middle managers leaving large IT companies within three years is to be estimated within 3 percent. The 0.95 degree of confidence is to be used. A study conducted several years ago revealed that the percent of managers leaving wit..
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Define what social-emotional learning is and what it is not
: In this description, define what social-emotional learning is and what it isn't. Provide links for parents to find out more about it and what the research says about it. Describe how social emotional learning will enhance learning in other conten..
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List the inconsistencies, ambiguities, or omissions
: List the inconsistencies, ambiguities, or omissions in the above statement of requirements. Rewrite the statement (750 - 1000 characters) to clarify the description and correct the problems you found.
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Discuss the major challenges and benefits
: Discuss the major challenges and benefits of an inclusive attitude toward disabled workers in the U.S. workforce.
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Analysis of an ethical dilemma
: Refer to the "Collaborative Learning Community: Analysis of an Ethical Dilemma" resource for the dilemmas and resources that will be used for this multi-part assignment.
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