The monthly returns of two portfolios are to be compared. The monthly returns are analyzed for each of 10 months, with the months being chosen at randomand independently for the two portfolios. The following statistics for monthly returns are reported for portfolio 1 and portfolio 2.Portfolio 1 x₁ = 0.12 s=0.0049Portfolio 2 x₂ = 0.12-0.0016(The first row gives the sample means, and the second row gives the sample variances.)ofAssume that the monthly returns of the two portfolios are each normally distributed. Construct a 90% confidence interval for the ratio of the variances ofFthe monthly returns for these two portfolios. Then find the lower limit and upper limit of the 90% confidence interval.Carry your intermediate computations to at least three decimal places. Write your final responses to at least two decimal places. (If necessary, consult a list offormulas.)Lower limit:Upper limit:

Given that Sample variance s12=0.0049 S22=0.0016 n1=10 , n2=10

Answered: dependently for the two portfolios. The…

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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Given are five observations for two variables, x and y. 4 9 13 19 18 9 23 21 Develop the 95% confidence and prediction intervals when a = 15. (to 4 decimals) t-value (to 3 decimals) (to 4 decimals) Spred (to 4 decimals) Confidence Interval for a = 15 ) (to 2 decimals) Prediction Interval for æ = 15 ) (to 2 decimals) The two intervals are different because there is more variability associated with predicting - Select your answer - value than there is Select your answer - v value.
The following data represent the length of time, in days, to recovery for patients randomly treated with one of two medications to clear up severe bladder infections. Find a 95% confidence interval for the difference u, - H, between in the mean recovery times for the two medications, assuming normal populations with equal variances. Medication 1 n, = 11 x1 = 14 = 1.4 Medication 2 n2 = 12 X2 = = 17 2 = 1.2 S Click here to view page 1 of the table of critical values of the t-distribution. Click here to view page 2 of the table of critical values of the t-distribution. The confidence interval is (Round to two decimal places as needed.)
Find the 98% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.) Sample Number Mean Std. Dev. 1 16 38 29 2 29 28 29 Lower Limit Upper Limit
Age x and resting heart rate y were sampled for 25 randomly selected children from age 2 to 9. Summary information is: n = 25, Σx = 140.5, Σx2 = 903.75, Σy = 2567, Σy2 = 264, 457, Σxy = 14, 171.5 (a) Compute a 95% confidence interval for the average resting heart rate of 3 six year old children.
MO21. A particular brand of diet margarine was analyzed to determine the level of polyunsaturated fatty acid (in percentages). A sample of six packages resulted in the following data: 12.8, 14.3, 11.1, 16, 13.5, 12. Calculate the 99% confidence interval on the population mean but input only the value of the upper limit of the Cl in the blank provided up to 2 decimal places. Provide all the necessary solutions in the submission for both upper and lower limit. 10 Upper limit of the Cl is Blank 1. Blank 1 Add your answer
#13. A random sample of 20 health maintenance organization was selected. For each health maintenance organization, the co-pay (in dollars) for doctors office visit was recorded. The results are as follows. 33, 41, 39, 27, 47, 60, 58, 31, 47, 25, 41, 42, 50, 47, 32, 35, 50, 55, 46, 37 Under the assumption that co-pay amounts are normally distributed find a 90% confidence interval for the mean co-pay amount in dollars. Give the lower and upper limit of a 90% confidence interval. Then give its lower limit and upper limit. Carry your intermediate computations to at least three decimal places in round your answer to one decimal place. Lower limit: Upper limit:
Please case Example 3
品2 learn.zybooks.com DZL 4-3 Project One Submission -.. DZL 6-2 Participation Activities: Con... Z 5.2 - MAT 240: Applied Statistics DZL Module Five MAT 240: Applied Statistics home > 6.1: Confidence intervals E zyBooks CHALLENGE 6.1.1: Confidence intervals for population mean. ACTIVITY 389226.2543846.qx3zqy7 Jump to level 1 A clothing retailer is interested in the average waist size of men. A sample is taken with the results given below. Column1 Mean 41.32 Standard Error What is the sample statistic? = 41.32 C 1.447 Median 40 What is the point estimate for the average waist size? 41.32 Mode Standard Deviation 6.307 Sample Variance 39.78 What is the level of confidence as a decimal? Ex0.55 Kurtosis -0.79 Skewness 0.571 What is the margin of error? 2.509 Range Minimum 32 What is the confidence interval? [ Maximum 52 Sum 785 Count Confidence Level(90.0%) 60 LEGO Check Next References (*1) The Media Insight Project. "How Millennials Get News: Inside the Habits of America's First Digital…
Compute the mean and standard deviation of the time spent for studying andcurrent CGPA for male and female.
An NHANES report gives data for 647 women aged 20–29 years. The BMI of these 647 women was x= 25.8. On the basis of this sample, we want to estimate the BMI u in the population of all 20.6 million women in this age group. We treated these data as an SRS from a Normally distributed population with standard deviation o = 7.1. (a) Give three confidence intervals for the mcan BMI u in this population, using 90%, 95%, and 99% confidence. Enter the lower and upper bound for the 90% confidence interval. (Enter your answers rounded to two decimal places. If you are using Crunchlt, adjust the default precision under Preferences as necessary. See the instructional video on how to adjust precision scttings.) lower bound = uррer bound Enter the lower and upper bound for the 95% confidence interval. (Enter your answers rounded to two decimal places. If you are using Crunchlt, adjust the default precision under Preferences as necessary. See the instructional video on how to adjust precision…

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