Case 3-UP NY Dinner

1. The old adage “time is money” comes into play here, too, as saving time is often tantamount to reducing costs. (10 sentences) 2. Downside of cost cutting or cost minimization (10 sentences) 3. What is Budget Vs. Actual? Why is it Important? What Causes the Variance? What is the implication of having a good variance-analysis in the company? (10 sentences)

For the following time series plots, explain what type of transformation, if any, would make the variance more stable.

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FIVE. Which of the following is true about standard deviation?     The first step in calculating the standard deviation is calculating the square root.   The second step in calculating the standard deviation is to subtract each measurement from the intermediate value and then square that difference.   The last step in calculating the standard deviation is to sum the squared values and divide by the number of values minus one.   Standard deviation is a type of average where the positive and negative numbers sum to zero.   The amount of difference of the measurements from the central value is called the sample standard deviation.

2572/quizzes/secured#lockdown Continuous Question 2 Classify the random variable as either discrete or continuous. The number of runs scored in a 9 inning baseball game. O Discrete O ContinuouS Question 3 Larger values of the standard deviation result in a normal curve shifted to the right

ii) Suppose that you find out that you have an OLS estimator which is unbiased but has a non-minimum variance. Discuss two practical steps that you take to reduce the variance of your OLS estimator. Explain your reasoning.

The following table compares the completion percentage and interception percentage of 5 NFL quarterbacks. Completion Percentage 55 59 60 60 62 Interception Percentage 4.5 4.2 3.5 2.9 1.4 Step 2 of 5: Calculate the estimated variance of errors, s. Round your answer to three decimal places.

Year Returns X Y 116% 22% 2 30 31 3-23-28 4 11 12 5 10 22 Using the returns shown above, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. (Do not round intermediate calculations. Enter your average return and standard deviation answers as a percent rounded to 2 decimal places, e.g., 32.16. Enter your variance answers rounded to 5 decimal places, e.g., 16161.)

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(a) The demand for a commodity is given by Q = Bo + B₁P+u, where Q denotes quantity, P denotes price, and u denotes factors other than price that determine demand. Supply for the commodity is given by Q = % + v, where v denotes factors other than price that determine supply. Suppose that u and u both have a mean of zero, have variances o and o2, and are mutually uncorrelated. Solve the two simultaneous equations to show how Q and P depend on u and v. (b) Derive the covariances between P and u in part (b). Is the least squares estimator of slope coefficient 3₁ in the demand equation unbiased and consistent?

how to calulate the fixed overhead spending variance?

Question One a) The University of the East Europe is interested in the overall performance of its students in the academic year 2020/2021. There were 1460 students registered for this academic year. The University decides to select a sample of 150 students from each of the 5 faculties- Science, Medicine, Law, Social Science and Humanities in proportion to the number of students in each faculty. Identify the population of interest for this scenario. ii. i. Identify the sampling technique used by the researcher. State one advantage and one disadvantage of the sampling technique described in the given scenario. If the medical faculty has 584 students registered, calculate how many medical students would be part of the sample of 150. iii. iv.

Q.3 What is the difference between ordinary least square and maximum likelihood ( ML ) estimators ? Also discuss their properties ?

(26) A company is interested in determining whether the average life of HP and Epson printers is different. A sample of HP and Epson printers result in the following: HP: average life-7 years Standard deviation -2 years n- 10 Epson: average life - 5.5 years Standard deviation -2.5 yearsn-8 At a-.05, is there a statistically significant difference between the longevity of the two brands of printers?

What is sampling? Explain the differences between probability and nonprobability samples and identify the various typesof each

Give an example of a kind of sampling error you might see in a poll besides random sampling error

The following table compares the completion percentage and interception percentage of 5 NFL quarterbacks. Completion Percentage 55 59 60 60 Interception Percentage 4.5 4.2 3.5 2.9 62 1.4 Step 3 of 5: Calculate the estimated variance of slope, $2. Round your answer to three decimal places. 'bi

From the wines listed in Table 13.11, which are themost profitable and which are the least profitable?Why?

Suppose that the repeated application of a pesticide used on orange trees causes harmful contamination of groundwater. The pesticide is applied annually in almost all of the orange groves throughout the world. Most orange growers regard the pesticide as a key input in their production of oranges. Note:- Do not provide handwritten solution. Maintain accuracy and quality in your answer. Take care of plagiarism. Answer completely. You will get up vote for sure.

Question: It is known that the mean diameters of rivets produced by two firms A and B are practically the same but the standard deviations may differ. For 22 rivets produced by firm A, the standard deviation is 2.9 mm. while for 16 rivets manufactured by firm B, the standard deviation is 3-8 mm. Compute the statistic would use to test whether the you products of firm A have the same variability as those of firm B and test its significance?

Explain whether the empirical evidence supports the claim that “investors are solely concerned with mean and variance”

9 Use the filtering model to determine the number of high quality (H) and low quality (L) homes at time t. Assume that there are a total of 2,000 homes in the community in time (t-1), of which 40% are high quality and the rest are low quality, the filtering rate is 0.03, and the retirement rate is 0.02

In your own words, describe what the difference is between an error term and a residual. How does sample size affect the variance of each?

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The height (in inches) of a random sample of players in NCAA Division 1 basketball teams is shown to the left.    x 75 80 75 87 77 77 67 83 77 80 73 82 73 71 80 76 72 78 68 74 74 72 76 86 77 77 78   9 Sum of squared deviations:  ∑(x − x̅)² = _______. a 555.83         b 573.02         c 590.74         d 609.01

A 30-team league had HACT = 0.2!6 and a theoretical maximum of HMAX= 0.36 . Calculate the normalised variance and briefly comment on whether the league is more competitive or uncompetitive.

#7 What is the expected value Sell software on own? Decision alternative Sell Company Form Joint Venture Success (0.24) 2337 Moderate Success (0.4) 2337 Failure (0.36) 2337 Success (0.24) 2500 Moderate Success (0.4) 2794 Sell Software on own Failure (0.36) 1000 Submit Answer format: Number: Round to: 0 decimal places. Success (0.24) 5000 Moderate Success (0.4) 3500 Failure (0.36) -868 unanswered not_submitted Attempts Remaining: 2

The reliability of an estimator is assessed in terms of its _____. Select one: a. mean  b. ease of computation c. coefficient of variation d. variance

The annual salary of the staff members in a state government agency are shown here.  The first column shows the annual salary (S) and the second column the frequency (the number of employees earning that salary) labeled F.     The mean salary of agency's staff is:             S F $120,000 1 91,000 2 86,000 4 65,000 10 57,500 24 44,000 10 a $61,098 b $60,195 c $59,306 d $58,429

Explain Standard errors for TSLS (two stage least squares)?

A very small town has only 15 households and they have the following annual incomes: $52,000, $22,000, $92,000, $8,000, $118,000, $62,000, $38,000, $14,000, $132,000, $46,000, $26,000, $96,000, $54,000, $110,000, $80,000. Based on this information, answer the following: a) Calculate the share of total income received by each quintile of this income distribution. Show your work! b) Do the top and bottom quintiles in this distribution have a greater or larger share of total income than the top and bottom quintiles of the U.S. income distribution for 2011? Compared to the U.S. does this city have higher or lower income inequality? (In 2011, the bottom quintile of the income distribution received 3.2% of income and the top quintile, 51.14%)

Explain probability and nonprobability samplingtechniques.

A survey conducted by a song rating service finds that the percentages of listeners familiar with "Poker Face" by Lady Gaga who would give the song ratings of 5, 4, 3, 2, and 1 are, respectively, 43 percent, 21 percent, 22 percent, 7 percent, and 7 percent. Assign the numerical values 1, 2, 3, 4, and 5 to the (qualitative) ratings 1, 2, 3, 4, and 5 and find an estimate of the probability distribution of x = this song's rating by a randomly selected listener who is familiar with the song. Find the expected value of the estimated probability distribution. (Round your answer to 2 decimal places.) μx