how does the standard devistion is used in investment analysis

Q: A real estate agent Jennifer Nguyen was asked to analyze the one-bedroom condo prices in the GTA.…

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Q: Example 18.2 For the probability density of a system of random variables (X, Y): f(x, y) = 0.5 sin…

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Q: In order to control costs, a company wishes to study the amount of money its sales force spends…

A: From the provided information, Sample size (n) = 6

Q: Heater Wattage Area 1 1000 108 2 750 291 3 1500 100 4 1000 43 5 1250 68 6 1500…

A: Given data: Wattage Area 1000 108 750 291 1500 100 1000 43 1250…

Q: Which of the following is not a condition that needs to be assessed in multiple linear regression? o…

A: The assumptions of a multiple linear regression are:  1. Linearity that is a linear relationship…

Q: An elementary school with 5000 students offers a low-cost "hot lunch." Assuming a binomial…

A: Let X: number of students who purchase a hot lunch. X~binomial(n,p)where n=5000   and  p=35%=0.35

Q: A researcher recorded the stopping distance for two types of cars at a speed of 100 km/h. The…

A: Given information: Midsize Car Compact Car 186 211 190 276 186 198 204 204 186 218…

Q: In this problem, we explore the effect on the standard deviation of adding the same constant to each…

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Q: A regression was run to determine if there is a relationship between hours of TV watched per day (x)…

A: As Prof. N. G. Das said "By regression we mean estimation or prediction of the average value of one…

Q: X 0 1 2 3 P(x) 0.15 0.3 0.05 0.5 Find the standard deviation of this probability distribution. Give…

A: Given probability distribution is X P(X) 0 0.15 1 0.3 2 0.05 3 0.5

Q: Noah wants to advertise how many chocolate chips are in each Big Chip cookie at his bakery. He…

A: Suppose µ is the population average number of chocolate chips per cookie for Big Chip cookies.

Q: Avg Per Pupil Expenditure Chapter 4: Section Exercises 25000 20000 15000 10000 40000 50000 60000…

A: The question is about correlation and regression Given : Reg. eq. : Avg. Per Pupil expenditure =…

Q: SHOP AT WORK, LOSE YOUR JOB?  CareerBuilder.com conducted a survey of 2245 employers asking if they…

A: Given Information: Sample size n=2245 x=257 A manager at a local recruiting agency claims that more…

Q: Strikeouts 260- 240 220 200 180 160 140 120 100 B. (Source: StatCrunch: 2011 MLB Pitching Stats…

A: Correlation defines how strong or weak association between two variables i.e., independent and…

Q: A botanist wishes to estimate the typical number of seeds for a certain fruit. She samples 58…

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Q: For a given confidence level, t*df is larger than z*. . Explain how t*df being slightly larger than…

A: Suppose there are n data points. We need to compute that confidence interval. For t confidence…

Q: t appears that not all people are equally vulnerable to cancer.
People from some ethnic groups have…

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Q: want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the…

A: Given Standard deviation=20.8 Margin of error= 1

Q: A researcher would like to test the claim that the proportion of middle-aged smokers with a lung…

A: Claim of the study;A researcher would like to test the claim that the proportion of middle-aged…

Q: ue. Round the answer to at least four decima

A: Given : x¯=22.8σ=10.0μ=19.8n=101α=0.10

Q: A machine that dispenses coffee is calibrated such that the machine on average dispenses 7.0 ounces.…

A: Given information Sample mean x̅ = 7.4 ounces Population mean µ = 7.0 ounces Sample size n = 10…

Q: Impact of Sample Size on Accuracy Compute the standard error for sample proportions from a…

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Q: A​ state-by-state survey found that the proportions of adults who are smokers in state A and state B…

A: Consider p1 as the proportion of adults who are smokers in state A and p2 as the proportion of…

Q: Lombard Electronics Company has just installed a new machine that makes a part that is used in…

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Q: Deon wants to advertise how many chocolate chips are in each Big Chip cookie at his bakery. He…

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Q: Consider the following model between net international reserves (NIR) and foreign liabilities (fl)…

A: Regression analysis

Q: Please use the accompanying Excel data set or accompanying Text file data set when completing the…

A: Given: n = 21 Formula Used: The equation of regression line is: Y = a + bX Slope b =…

Q: Sisters and Brothers The scatterplot shows the numbers of brothers and sisters for a large number of…

A: The scatterplot of number of brothers and sisters for a large number of students is given.

Q: The lifetime of a certain residential air conditioner is normally distributed with a mean of 20…

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Q: A The number of girls in a family B The colour of hair C The gender of a person D The length of a…

A: “Since you have posted multiple questions, we will solve first questionfor you. To get the remaining…

Q: If 80% ·of an ore stockpile consists of copper ore particl~s (the material or value) and 20% of…

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Q: A garage has a letter-keypad lock with the eight letters A,B,C,D,E,F,G,H. The keypad can be…

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Q: 13. In a survey about the safety of air travel, 69% of the 1044 surveyed from the United States said…

A: Given : In a survey about of air travel ; 69% of the 1044 surveyed form U.S said that they consider…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

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Q: Less than 58% of workers indicate that they are mildly dissatisfied with their job. Express the null…

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Q: Here are the choices:One way ANOVA one sample t-testDependent t-test 2-factor ANOVA Independent…

A: ANOVA: Suppose the hypothesis test is performed to determine a significant difference between more…

Q: 4.12 Height and Weight for Women The figure shows a scatterplot of the heights and weights of some…

A: Given : There is given a scatter plot between two variables height (inches) & Weight (pounds)

Q: Question 11 These variables usually take on integer values and cannot be be manipulated through…

A: Data and research

Q: A researcher reported that a sample of size n=30 produced a sample mean of 32.56% and a sample…

A: Given: Sample size (n) = 30 Sample mean x¯=32.56 Sample standard deviation (s) = 6.56 Confidence…

Q: A barber shop has homogeneous, independent arrivals every 10 minutes.  The interarrival times are…

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Q: Hypotheses and summary sample statistics are given for a test for a mean. Assume that the conditions…

A: Given X-bar=108 n=20 S=35.6 Mean=100

Q: Match the following scenario with the appropriate statistical test found on the right drop down…

A: Introduction: The chi-square test can be used to test the in the following scenarios: To test the…

Q: Question 2 A manufacturing company want to compare the yield from two engineering process. The…

A: Given data:   Good Bad Total Process A 86 14 100 Process B 80 20 100 Total 166 34 200

Q: deviation is within 30% of the population standard deviation. A histogram of a sample of those…

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Q: If n = 5, T-46, and s= 13, construct a confidence interval at a 80% confidence level. Give your…

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Q: In a test of the effectiveness of garlic for lowering cholesterol, 47 subjects were treated with…

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Q: Q5. As we increase the confidence level from (e.g., 90% to 95%), the confidence interval length…

A: Precision of estimate  is directly related to margin of error.

Q: d to be credited back as this answer is incomplete and incor

A: Given: Population mean μ=169 Population standard deviation σ=72.9 Sample size (n) = 10

Q: Hypotheses and summary sample statistics are given for a test for difference in means using paired…

A: We have given that x̅d = 3.1  sd = 9.4 nd = 10 Significance level (α) = 0.05 The null and…

Q: Giving a test to a group of students, the grades and gender are summarized below A B 14 20 16 11 10…

A: Let p represent the population proportion of all female students who received a grade of A on this…