In making the decision to return to school for an MBA, prospective students desire to know thetime it will take to recoup their investment (forgone wages plus tuition and other direct costs).The time it will take to recoup their investment is normally distributed. You are in charge ofestimating this time for a brochure advertising an MBA program at UCLA. You randomly sample20 past UCLA MBA students and find that the sample average is 3.61 years with a standarddeviation of 0.63 years. To estimate the mean number of years required to recoup an investmentin a UCLA MBA to within 2 months (0.17 years) with 90% confidence, the sample size shouldbe approximately38.O 75.53.23.none of the above.OE0CAn AMacBook ProWPzoom

Solution-:Given: We want to find the sample size (n)=?

Answered: In making the decision to return to…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The ABC Company is involved in the production and selling of consumer goods, particularly beauty products such as bath soap and shampoo and had registered a positive profit growth for the last 10 years. However, the current year seems to be different from those years as the company is expecting a decline in profit; which is estimated to be about 70% below the target. The manager now is in a dilemma … asking himself/herself “What happened, why this decline in profit?” The Manager then asked the company Accountant to give him/her the data on sales and advertising cost for the last 10 years – he/she wants these data to determine whether the company can live without advertising, as advertising cost happens to be substantial. Justify your answer by doing as step-by-step procedure in Correlation Analysis using a 0.05 level of significance. The data are as follows –
.A new, miracle diabetes drug that diminishes major symptoms of diabetes has been approved by the FDA. Health care professionals and researchers believe that the new drug will prolong lifespan of diabetes patients. If the population is in steady state and the incidence is constant, what will the effect of this new drug be on the prevalence of diabetes in the population? Explain.
Stock Market Listed on the top of the next page in order by row are the annual high values of the Dow Jones Industrial Average for each year beginning with 1990. Find the best model and then predict the value for the year 2014 (the last year listed). Is the predicted value close to the actual value of 18,054?
From the data in the table it shows the 2019 daily return data for the S&P 500 Index (stocks) and the US 30 year Bond (bonds). How do I test the hypothesis that mean daily return on stocks exceeds the mean daily return on bonds? Please show the steps. S&P500 dailt returns data: Date Price Daily Return 2019-12-31 3230.78 0.294602% 2019-12-30 3221.29 -0.578082% 2019-12-27 3240.02 0.003398% 2019-12-26 3239.91 0.512817% 2019-12-24 3223.38 -0.019545% 2019-12-23 3224.01 0.086614% 2019-12-20 3221.22 0.494478% 2019-12-19 3205.37 0.445929% 2019-12-18 3191.14 -0.043230% 2019-12-17 3192.52 0.033529% US 30 Year Bond Date Price Daily Return 31-Dec-19 2.389 2.32% 30-Dec-19 2.335 0.78% 29-Dec-19 2.317 -0.03% 27-Dec-19 2.318 -0.16% 26-Dec-19 2.321 -0.71% 25-Dec-19 2.338 0.15% 24-Dec-19 2.334 -0.83% 23-Dec-19 2.354 0.31% 22-Dec-19 2.346 0.12% 20-Dec-19 2.344 -0.43%
An increasing number of consumers believe they have to look out for themselves in the marketplace. According to a survey conducted by the Yankelovich Partners for USA WEEKEND magazine, 60% of all consumers have called an 800 or 900 telephone number for information about some product. Suppose a random sample of 20 consumers is contacted and interviewed about their buying habits. Appendix A Statistical Tables (Round your answers to 3 decimal places when calculating using Table A.2, e.g. 0.215.) a. What is the probability that 11 or more of these consumers have called an 800 or 900 telephone number for information about some product? b. What is the probability that more than 15 of these consumers have called an 800 or 900 telephone number for information about some product? c. What is the probability that fewer than 8 of these consumers have called an 800 or 900 telephone number for information about some product?
Consider the following returns for two investments, A and B, over the past four years: Investment 1: 7% 10% 10% -4% 6% Investment 2: 7% -3% 15% a-1. Calculate the mean for each investment. (Round your answers to 2 decimal places.) Mean Investment 1 Investment 2
the costello Music company has been in business for five years. during that time, salesof pianos increased from 12 units in the first year to 76 units in the most recent year. Fredcostello, the firm’s owner, wants to develop a forecast of piano sales for the coming year.the historical data follow.Year 1 2 3 4 5Sales 12 28 34 50 76a. construct a time series plot. What type of pattern exists in the data?b. develop the linear trend equation for the time series. What is the average increase insales that the firm has been realizing per year?c. Forecast sales for years 6 and 7.
The picture is attached. If it is not clear, the shaded region of the graph represents 5%. Thanks in advance.
I can't seem to figure this question out and need help please, thanks so much.

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