standard deviation and the higher variance. If we compare both stocks‚ Reynolds is riskier than Hasbro in this case. The higher variance indicates higher chance that the actual return on Reynolds will deviate from the expected return. S&P 500 REYNOLDS HASBRO Mean/Average 0.574333 1.874833 1.183833 Variance 12.972333 87.730541 65.866763 Standard Deviation 3.601713 9.366458 8.115834 Answer 2. At individual stock level‚ Reynolds fluctuates more than Hasboro as it has higher Standard Deviation and
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the sample| d.|mean of the population| ANS: A 5. A simple random sample of 100 observations was taken from a large population. The sample mean and the standard deviation were determined to be 80 and 12 respectively. The standard error of the mean is a.|1.20| b.|0.12| c.|8.00| d.|0.80| ANS: A 6. A population has a standard deviation of 16. If a sample of size 64 is selected from this population‚ what is the probability that the sample mean will be within 2 of the population mean? a.|0.6826| b
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processes. In one particular application‚ a client gave Quality Associates a sample of 800 observations taken during a time in which that client’s process was operating satisfactorily. The sample standard deviation for these data was .21; hence‚ with so much data‚ the population standard deviation was assumed to be .21. Quality Associates then suggested that random samples of size 30 be taken periodically to monitor the process on an ongoing basis. By analyzing the new samples‚ the client could quickly
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probability of over 99%; these plans are: CTC‚ HIC‚ and RCNC1. CTC costs are estimated to be the lowest when considering the average of $13.5m and standard deviation of only ~$2m which reflects a lower spread of the costs. Additionally‚ CTC cost savings average ~$14.5m when compared with the other plan offerings‚ with a low standard deviation which reflects more predictable savings. Similar results are obtained when we consider a safer accident rate (i.e.‚ 1 in 6‚6m flights). 2. Cost analysis
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of anorexia nervosa‚ leprosy (leprosy stigma)‚ or of a physical disability or social disability‚ such as obesity. 2. Deviations in personal traits‚ including mental illness‚ drug addiction‚ alcoholism‚ and criminal background are stigmatized in this way. 3. "Tribal stigmas" are traits‚ imagined or real‚ of ethnic group‚ nationality‚ or of religion that is deemed to be a deviation from the prevailing normative ethnicity‚ nationality or religion. SOCIAL STIGMA Social stigma is the extreme disapproval
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STATISTICS - Lab #6 Statistical Concepts: Data Simulation Discrete Probability Distribution Confidence Intervals Calculations for a set of variables Open the class survey results that were entered into the MINITAB worksheet. We want to calculate the mean for the 10 rolls of the die for each student in the class. Label the column next to die10 in the Worksheet with the word mean. Pull up Calc > Row Statistics and select the radio-button corresponding to Mean. For Input variables:
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20 Leaf Unit = 1.0 9 0 124456667 (3) 1 249 8 2 128 5 3 03 3 4 27 1 5 2 Calculating Descriptive Statistics 4. Calculate descriptive statistics for the variable Height by Gender – Gender Mean Standard deviation Females 67.273 2.533 Males 69.78 4.21 Select File > Save Worksheet As to save the data set. You must either keep a copy of this data or download it again off the web site for future labs. Short Answer Writing Assignment All answers
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between results‚ as initial values may have been different. Standard Deviation This measures the spread of data‚ and it can only be calculated when there is more than one repeat. The larger the standard deviation‚ the more widely spread the data is and therefore you have a less reliable mean. You can compare the standard deviation of two different sets of data‚ if the two standard deviation values
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service clients. However‚ TDS is organized into 100 different geographically regions. The average sales for a region is $1‚000‚000‚ with a standard deviation of $100‚000. The manager of each geographical region has the autonomy to establish a compensation plan. The average annual compensation for an insurance agent is $60‚000‚ with a standard deviation of $12‚000. Assume that TDS has hired you as a consultant. Your services are desired to help TDS make two critical decisions. The first decision
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Gonzalez Paez Student ID --65824138 November 28‚ 2013 1. Suppose that you can trade a riskless asset that yields 5% and two risky assets A and B. The expected return of asset A is 8% and that of asset B is 11%‚ while the standard deviation of asset A is 14% and that of asset B is 23%. The covariance between assets A and B is ?0:0322. Solution . rA‚B= CovAR(A‚B) / [(σA)(σB)] = -0.0322 / (14%)(23%) rA‚B = -1 But when rA‚B = -1‚ (σp)^2 = [wA(σA) – wB(σB)]^2‚ σp = wA(σA)
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