The covariance matrix of an image with three spectral components is shown below. Let x₁, x2, and x3 denote the spectral components of each pixel in the image. Find a new variable of the form y₁ = C₁x₁ + C₂x₂ + C3x3 that has maximum possible variance, subject to the constraint that c² + c3 + c3 =1. What percentage of the total variance in the data is explained by y₁? 27.22 19.55 6.00 S 19.55 21.88 13.36 6.00 13.36 25.32 (...)
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- To detect bivariate outliers between all predictor variables and the criterion variable, the researcher should use which of the following?: Group of answer choices a Box and Whisker plot. a matrix scatter plotIf X is a random variable with expectation µ and variance cµ2 , where c is a constant. Find a variance stabilizing transformation of X.Question 18 A researcher reported the following covariance matrix for her 3-item (7-option Likert item responses) test. Item1 Item2 Item3 Item4 Item1 3.84 2.63 1.89 2.14 Item2 2.63 3.62 2.10 2.25 Item3 1.89 2.10 3.68 2.52 Item4 2.14 2.25 2.52 3.80 What is the value of coefficient alpha? Question 19 In which of the following test assumptions is coefficient alpha NOT equal to reliability?
- In a Bernoulli process with success rate .4, if we consider the total number of successes X which happened on trials 7,9,15,16, 23, and if Y is the total number of successes on trials 15,23, 32,38, 43, then what is the covariance of X with Y?You are asked to evaluate 'Introduction to the Matrix' from the statistical data of thefollowing 7 'Introduction to the Matrix' course grade distributions: Class A Class B Class C Class D Class E Class F Class GMean 71.8 75.2 73.8 82.2 79.6 78.0 73.7Median 79.3 78.5 80.1 83.4 81.4 77.6 75.9Mode 80.1 78.5 80.5 83.0 81.0 78.0 70.0Std Dev 18.6 15.9 15.5 5.1 11.4 7.0 15.1Students 24 23 14 17 29 18 13 (a) With 95% Statistical Confidence would you conclude that all Seven (7) CourseResults are consistent with the Same Student Population (Do these results comefrom the same population)? (b) Provide your conclusion (a) in up to 100 words.You currently own a portfolio of eight stocks. Using the Markowitz model, you computed the optimal mean/variance portfolio. Theweights of these two portfolios are shown in the following table: Stock A B C D E F G HYour Portfolio 0.12 0.15 0.13 0.10 0.20 0.10 0.12 0.08M/V Portfolio 0.02 0.05 0.25 0.06 0.18 0.10 0.22 0.12 You would like to rebalance your portfolio in order to be closer to the M/V portfolio. To avoid excessively high transaction costs, you decide to rebalance only three stocks from your portfolio. Let xi denote the weight of stock i in your rebalanced portfolio. The objective is to minimize the quantity |x1-0.02|+|x2-0.05|+|x3-0.25|+...+|x8-0.12| which measures how closely the rebalanced portfolio matches the M/V portfolio. Formulate this problem as a mixed integer linear program.