the subject Answer Key: A Question 7 of 20 0.0/ 1.0 Points Which of the following are the two most commonly used measures of variability? A.Range and interquartile range B.Mean and variance C.Variance and median D.Variance and standard deviation Answer Key: D Question 8 of 20 1.0/ 1.0 Points Numerical variables can be subdivided into which two types? A.Cross-sectional and discrete B.Nominal and progressive
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(RM) Revenue Allocation (%) Food Utilities Transportation Education Recreation Others Total 100% Based on the table above‚ (i) Represent your data using three different statistical graphs. (ii) Calculate the mean and standard deviation for the allocation of income to use at least two methods. Give your comment. SECTION B (i) Collect data from the 5 friends and record your findings in Table 1. (ii) Compare and comment on your findings. (iii) Draw on the same axis‚
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population Mean: Standard Deviation: If population of individual measurements is normal‚ x is normal Sample size (n ≥ 30)‚ x is normal To convert any random variable X to standardized normal random variable Z: To determine the percentile using z-score‚ use normalcdf(lower‚ upper‚ mean‚ standard deviation). To determine Z using the given area from the left of the bell curve and standard deviation‚ use invNorm(probability‚ mean‚ standard deviation). If using the right
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distribution‚ the mean and the median are not equal. d. The graph of a normal distribution is symmetric. (Correct) Using the 68-95-99.7 rule: Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: Suggest you make a drawing and label first… a. Percentage of scores less than 100 50% b. Relative frequency of scores less than 120 84% c. Percentage
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factor: Multiply SE of sample mean by fpc to make the correction ------------------------------------------------- Independent samples of same population with same standard deviation (variances are equal). Confidence interval: df for t-multiple is (df1 + df2)‚ or (n1 – 1) + (n2 - 1) Pooled estimate of common standard deviation: SE of difference between two sample means ------------------------------------------------- Confidence interval for differences in sample means when variance is
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Gender Discrimination: A Statistical Analysis Gender discrimination‚ or sex discrimination‚ may be characterized as the unequal treatment of a person based solely on that person ’s sex. . It is apparent that gender discrimination is pervasive in the modern workplace‚ however‚ its presence and effects are often misrepresented and misunderstood. Statistical testing plays an important role in cases where the existence of discrimination is a disputed issue and has been used extensively to compare expected
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Analyzing and Interpreting Data – BIMS‚ Inc. QNT/351 Analyzing and Interpreting Data – BIMS‚ Inc. Consulting Group – Team D has performed a series of analysis on behalf of the top management of Ballard Integrated Managed Services‚ Inc (BIMS). These tasks were the result of an emerging trend of attrition and employee dissatisfaction within their organization. The initial actions taken involved data collection that were presented in the form of an internal employee survey. The data collection
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manager! Before attempting those questions‚ be sure to read carefully Chapter 8 of Bodie‚ Kane‚ and Marcus’s Investments book. Also‚ I have included an Excel spreadsheet (Exhibit 1)‚ which contains data on several stocks‚1 including returns‚ standard deviations and correlations‚ and a simple three asset optimizer model‚ which makes use of the Microsoft Excel Solver Add-In‚ along with some simple instructions. Markov’s starting date of September 1 was approaching fast; it was‚ in fact‚ only a week
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X= 60‚ level of significance= 0.05 * Reject null hypothesis GENETICS | | | | Data | Null Hypothesis = | 0.79 | Level of Significance | 0.05 | Population Standard Deviation | 20 | Sample Size | 100 | Sample Mean | 60 | | | Intermediate Calculations | Standard Error of the Mean | 2 | Z Test Statistic | 29.605 | | | Two-Tail Test | | Lower Critical Value | -1.959963985 | Upper Critical Value | 1.959963985 | p-Value | 0 | Reject the
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Each problem/question is worth 3 points. Please label your answers with the correct chapter and problem in the submission area. • Chapter 1: Exercises 2‚ 3‚ and 6 • Chapter 2: Exercises 1‚ 5‚ and 6 Chapter 1: Exercises 2‚ 3‚ and 6 2.Shareholders want high long-term profits. Managers want job security and wonderful perks and amenities. Since risk and return tend to be positively related‚ managers may wish to avoid risks that shareholders want the managers to undertake. To encourage managers
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