expected value of the random variable or population of arithmetic mean of x and y: μ = Σ x / N = 2‚500/5 = 500 = 3‚000/5 = 600 Solution 2: The variance for x is 5‚000‚000 The variance for y is 5‚050‚000 Solution 3: The Standard deviation is found by squaring the result of the variance: SD of x = 2236‚ this tells us on average how far is from sample mean. SD of y = 2247 Solution 4: The coefficient of variation is as follows: The coefficient of variation
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is high The formulas for standard deviation are given below but you should look at the examples first Population mean Population variance method 1 ‚ Population variance method 2 ‚ (it does not matter what method you use both give the same answer‚ the only thing you need to know about variance is that it is population standard deviation squared so if variance is high then standard deviation is high Population standard deviation σ = Example 1 find the population mean μ and population standard
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included in the model are publicly traded financial assets such as bonds and stocks. Investors borrow or lend at a risk free rate. Investors have no transactions cost and do not pay taxes on returns • All investors in the market are rational mean variance optimisers. • Finally‚ investors have homogenous expectations which imply that they analyse securities in the same way‚ share the same economic view of the world‚ therefore they share identical estimates of probability distributions of cash
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quantitative variable. The measures of central tendency and variation are calculated for this variable below: Statistics: | Size | Mean | 3.42 | Standard Error | 0.24593014 | Median | 3 | Mode | 2 | Standard Deviation | 1.73898868 | Sample Variance | 3.02408163 | Kurtosis | -0.7228086 | Skewness | 0.52789598 | Range | 6 | Minimum | 1 | Maximum | 7 | Sum | 171 | Count | 50 | Frequency Distribution: | Size | Frequency | 1 | 5 | 2 | 15 | 3 | 8 | 4 | 9 | 5 | 5 |
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3104AFE STATEGIC MANAGEMENT ACCOUNTING INDIVIDUAL ASSIGNMENT Assessment weighting: 15% Due date: 19 April 2013‚ 5 pm. Submission: Gold Coast campus students: must submit the assignment to the Assignment Collection Centre‚ Library‚ Gold Coast Campus Nathan campus students: must submit the assignment to the Assignment Collection Centre ‚ Library‚ Nathan Campus Note: To be fair to all students in this course: 1. No extensions will be granted. 2. Convenor/ tutors will not give any feedback on the work
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Chapter 1 1(4). The risk premium is defined as the rate of return on A. A risky asset minus the inflation rate B. The overall market C. A Treasury bill D. A risky asset minus the risk-free rate E. A risk-less investment Answer: D 2(5). The variance measure the: Non-graded A. Total difference between the actual returns and the average returns B. Average difference between the actual squared returns and the risk-free returns C. Average squared difference between the actual returns
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(where the simple model is nested within the complicated one). One case where the distribution of the test statistic is an exact chi-squared distribution is the test that the variance of a normally distributed population has a given value based on a sample variance. Such a test is uncommon in practice because values of variances to test against are seldom known
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1. A quality control engineer knows that 10% of the microprocessor chips produced by a machine are defective. Out of a large shipment‚ five chips are chosen at random. What is the probability that none of them is defective? What is the probability that at least one is defective? 2. An automated manufacturing process produces a component with an average width of 7.55 centimeters‚ with a standard deviation of 0.02 centimeter. All components deviating by more than 0.05 centimeter from the mean must
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Quantitative methods Time value of money Effective annual rate (EAR) Effective annual rate (EAR) = (1+stated annual rate/frequency‚ m) ^ m-1 Annuities Ordinary annuities: cash flow at the end of each period‚ normal one; Annuities due: cash flow at the beginning of each period‚ first payment =t0; Calculator setting: [2nd][BGN]-[2ND][SET]; same procedure for setback to END; Payment at beginning of next three years‚ N=4‚ always +1 using annuities due It is a BGN question‚ if first payment is today
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than 10 minutes for a bus. 3. A recent study indicates that the annual cost of maintaining and repairing a car in a town in Ontario averages 200 with a variance of 260. If a tax of 20% is introduced on all items associated with the maintenance and repair of cars (i.e.‚ everything is made 20% more expensive)‚ what will be the variance of the annual cost of maintaining and repairing a car? (Ans: 374) 4. The time to failure of a component in an electronic device has an exponential distribution
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