A+ Answers of the following Questions

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1) The following practice is considered ethical when conducting business research:
A. Disclosing some, but not all, financial interests that may affect research 
B. Allowing participants to withdraw from a business research project whenever they ask to do so 
C. Keeping minimal records of research activities and research design 
D. Revealing only a small part of the purpose of the business research project 

2) If a population distribution is skewed to the right, then given a random sample from that population, one would expect that the
A. median is greater than the mean 
B. mode is equal to the mean 
C. median is less than the mean 
D. median is equal to the mean 

3) Textbook Price Number of Textbooks 
$25 to $35 2 
$35 to $45 16 
$45 to $55 5 
$55 to $65 7 
$65 to $75 20 
Estimate the standard deviation of the price of a textbook.
A. 14.03 
B. 33.85 
C. 196.78 
D. 729.00 

1) Textbook Price Number of Textbooks 
$25 to $34.99 2 
$35 to $44.99 16 
$45 to $54.99 5 
$55 to $64.99 7 
$65 to $74.99 20 
Estimate the mean price of a textbook.
A. $554.00 
B. $11.08 
C. $60.00 
D. $55.40 


2) A supermarket has determined that daily demand for eggs has a bell-shaped distribution, with a mean of 55 cartons and a standard deviation of six cartons. If the supermarket begins each morning with a stock of 61 cartons of eggs, approximately what percentage of days will there be a surplus of eggs?
A. 16% 
B. 18% 
C. 68% 
D. 84% 


3) Which of these measurement scales has a rank order associated with its use?
A. Ratio 
B. Ordinal 
C. Nominal 
D. Likert 

1) Identify the scale that has no meaningful zero.
A. Nominal 
B. Ordinal 
C. Interval 
D. Ratio 


2) __________ is a measure of the chance that an uncertain event will occur.
A. Random experiment 
B. Sample space 
C. Probability 
D. A complement 


3) The Information Commons in the main library has 150 personal computers. The probability that any of them will require repair on a given day is 0.02. To find the probability that 25 of the computers will require repair, one would use what type of probability distribution?
A. Binomial 
B. Poisson 
C. Normal 
D. Hypergeometric

1. U.S. high School enrollment has changed from approximately 13.7 million in 1995 to 16.3 million in 2005. 
Calculate the u.s. high school enrollment for 2002 and predict the us high school enrollment for 2010.

 
 
 
2  coefficient of x^3. The coefficient of x is 3 less than the coefficient of x^4. The remaining coefficient is 7 less than the coefficient of x. The sum of the coefficients is 15. Find the polynomial with your work.

3. cement awl of uniform width is built around a 20-ft by 40ft rectangular pool. The total area of the pool and the walk is 1500ft^2. Find the width of the walk. 

1.Booher Book Stores has a beta of 0.8. The yield on a 3-month T-bill is 4% and the yield on a 10 year T-bond is 6%. The market risk premium is 5.5% and the return on an average stock in the market last year was 15%. What is the estimated cost of common equity using the CAPM?

2.Describe responsibility accounting and its purpose. What conditions are necessary for responsibility accounting to be used effectively? 


3. what benefits does budgeting provide to an organization? Are there any disadvantages of budgeting?

1. For a particular sample of 80 scores on a psychology exam, the following results were obtained.
First quartile = 65 Third quartile = 98 Standard deviation = 8 Range = 56
Mean = 83 Median = 81 Mode = 59 Midrange = 64
Answer each of the following:
I. What score was earned by more students than any other score? Why? 
II. What was the highest score earned on the exam? 
III. What was the lowest score earned on the exam?
IV. According to Chebyshev's Theorem, how many students scored between 67 and 99?
V. Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 67 and 99?


2. Find the range, standard deviation, and variance for the following sample data:
67, 61, 31, 88, 23, 90, 7, 33, 19, 97, 60, 69, 61, 5, 87, 17

 


3. In terms of the mean and standard deviation:
- What does it mean to say that a particular value of x has a standard score of +0.8? 
- What does it mean to say that a particular value of x has a z-score of -2.2? 

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