WORLD_STOCKS. Using your answer to 2.a.‚ what is your estimate of the expected return on WORLD_STOCKS for next year? Explain. 3. Stock A’s expected return and standard deviation are E[r A] = 10% and A= 18%‚ while stock B’s expected return and standard deviation are E[rB] = 12% and B= 21%. 3.a. Determine the expected return and standard deviation of the return on a portfolio with weights A=0.3 and B=0.7 for the
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In this task‚ in result to a National Health Care Association being concerned about the shortage of nurses‚ I have a sample of 50 nurses degree of satisfaction in relation to work‚ pay and opportunities for promotion. This sample showed their degree of satisfaction on a scale from 0 to 100 from nurses from 3 different types of hospitals: Private‚ Veterans Administration and University. I have analysed this data to create results to better understand the current degree of job satisfaction amongst
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MELBOURNE INSTITUTE OF BUSINESS AND TECHNOLOGY In association with DEAKIN UNIVERSITY MIS171 Business Analytics Tutorial Week 2 Summary Measures for Numerical Variables Introduction In this week’s tutorial‚ we look at summarising a single numerical variable. There are five (5) aspects that need to be investigated: average‚ spread‚ location‚ shape and outliers. You will complete some of the work by hand and the rest using Microsoft Excel. Specifically the aims of this tutorial are to: Produce
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The History of statistics can be said to start around 1749 although‚ over time‚ there have been changes to the interpretation of the word statistics. In early times‚ the meaning was restricted to information about states. This was later extended to include all collections of information of all types‚ and later still it was extended to include the analysis and interpretation of such data. In modern terms‚ "statistics" means both sets of collected information‚ as in national accounts and temperature
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or quantity of data between the first and third quartile Moreover‚ height had the largest standard deviation‚ making the spread of the data quite wide and somewhat more scattered compared to the other two sets of data In contrast‚ right cubit length had the smallest variance‚ making the data less spread out‚ less scattered compared to the heights of people Also‚ right cubit length had the smalls standard deviation making the spread of the data less spread
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Mean & median are different (average/midpoint) – Five-number Summary – min‚ Q1‚ M‚ Q3‚ max o Outlier = 1.5 x (Q3-Q1) ± Q1/Q3 – Variance (s2) and Standard Deviation (s) measure spread of distribution‚ gets larger as spread increases – Median and quartiles are resistant‚ mean and standard deviation are not – Mean and standard deviation are for symmetric distributions – 5-number summary is for skewed distributions Chapter 3 – Density curve has total area of 1‚ rel. freq/interval o Idealized
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Assignment Number: 2 Workshop Day and Time: Thursday 02:15pm Tutor Name: Jackson Yuen Student ID Number Student Name 1. 2. 3. 4. Question 1: a. Count 150 Mode 22 Sum 3231 Standard Deviation 4.728 Range 29 Sample Variance 22.357 Maximum 36 Coefficient of Variance 0.22 Minimum 7 Mad 3.0 Mean 21.54 25th percentile 18.5 Median 22 75th percentile 25 The central location of the distribution includes mean‚ median and
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Find: Arithmetic Mean‚ Median‚ First and Third Quartiles‚ 90th percentile and 6th Decile. 2. A candidate is selected for interview for 3 posts. For the first post‚ there are 3 candidates‚ for the second‚ 4 and for the third post there are 2 candidates. What is the probability that the candidate is selected for at least one post? 3. The lifetimes of a colour TV picture tube is normally distributed‚ with a mean of 8 yrs and a standard deviation of 2 years. (i) What is the probability that
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Assignment on Central Tendency and Dispersion 1. A manufacturer of hand shovels is deciding what length handles to use. Studies of user preference reveal that the average‚ the median‚ mean and mode of preferred length are all different. What are the implications of using each of these values? Which value would you decide? 2. A given machine is assumed to depreciate 40 percent in value in the first year‚ 25 percent in value in the 2nd year and 10 percent in value in the next three years; each
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distinguish between the two in order to use the correct formula? mean; median; mode; range; quartiles; variance; standard deviation. 2. The following numbers represent the weights in pounds of six 7year old children in Mrs. Jones’ 2nd grade class. {25‚ 60‚ 51‚ 47‚ 49‚ 45} Find the mean; median; mode; range; quartiles; variance; standard deviation. 3. If the variance is 846‚ what is the standard deviation? 4. If we have the following data 34‚ 38‚ 22‚ 21‚ 29‚ 37‚ 40‚ 41‚ 22‚ 20‚ 49‚ 47‚ 20‚ 31‚ 34
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