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- The mean time to retrieve a record from an online database is 222 milliseconds with a standard deviation of 62 milliseconds. The design criterion requires that at least 80% of all retrieval times must not differ from the mean by more than 83 milliseconds. Use Chebyshev's inequality to establish whether the design criterion is satisfied. Would the design criterion be satisfied if it were known that the retrieval time is normally distributed with a mean of 222 milliseconds and a standard deviation of 62 milliseconds?Considering the attached set of securities and portfolio returns: Choose different values within the range of the standard deviation of the portfolio, and for each chosen value, locate the corresponding point on the efficient frontier by finding the weights that maximize the expected rate of return of the portfolio.MLE is the maximum likelihood estimation
- Define limited information maximum likelihood (LIML) estimator? Explain how it minimizes the homoskedasticity?A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 500 subscribers. The results indicate that 124 of the subscribers would upgrade to a new cellphone at a reduced cost. Reducing the price will be profitable if at least 20% of the subscribers would upgrade. Complete parts (a) and (b) below. Question content area bottom Part 1 a. At the 0.05 level of significance, is there evidence that more than 20% of the customers would upgrade to a new cellphone at a reduced cost? Determine the null hypothesis, H0, and the alternative hypothesis, H1. A. H0: π≥0.20 H1: π<0.20 B. H0: π≠0.20 H1: π=0.20 C. H0: π≤0.20 H1: π>0.20 D. H0: π=0.20 H1: π≠0.20 What is the test statistic? ZSTAT=enter your response…pls. answer using 7 steps:-Parameter of interest-Null hypothesisAlternative hypothesis -Test statistic -Reject H0 if: -Computations: -Conclusion
- Let expected return and standard deviation of a risky portfolio are 10% and 18% respectively. Risk-free rate is 5%. If your risk-aversion coefficient is 2.5 (with this value your utility is maximised), what will be the expected return and standard deviation of the complete portfolio at the point where your indifference curve is tangent to the CAL?A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a substantially reduced cost. Data are collected from a random sample of 600 subscribers. The results indicate that 131 of the subscribers would upgrade to a new cellphone at a reduced cost. Reducing the price will be profitable if at least 20% of the subscribers would upgrade. Complete parts (a) and (b) below. Question content area bottom Part 1 a. At the 0.01 level of significance, is there evidence that more than 20% of the customers would upgrade to a new cellphone at a reduced cost? Determine the null hypothesis, H0, and the alternative hypothesis, H1. A. H0: π=0.20 H1: π≠0.20 B. H0: π≥0.20 H1: π<0.20 C. H0: π≤0.20 H1: π>0.20 D. H0: π≠0.20 H1: π=