A manager at an investment bank is considering aninvestment in Meta stock. As part of her initialresearch, she calculates daily returns for the stockon the 20 trading days between 1/23/2023 and02/17/2023. Date2/17/20232/16/20232/15/20232/14/20232/13/20232/10/20232/9/20232/8/20232/7/20232/6/20232/3/20232/2/20232/1/20231/31/20231/30/20231/27/20231/26/20231/25/20231/24/20231/23/2023Daily Return (in %)0.3-2.7-1.303-2.1-3-4.33-0.3-1.223.32.81.3-3.134.1-1.1-0.12.81) What are the critical values you need toconstruct a 90% confidence interval for thestandard deviation of daily returns ?2) Calculate a 90% confidence interval for thestandard deviation of daily returns .(Roundnumbers to 1 decimal.)3) The manager will include a stock in her portfolioonly if the standard deviation of daily returns isbelow 6%. Conduct a hypothesis test to help themanager make her decision, using a significancelevel of 1% What do you conclude ? (In youranswer, show the steps involved with testing .)

The population variance is compared to the sample variance and it is tested using the test for…

Answered: 1) What are the critical values you…

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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Virginia wants to estimate the percentage of students who live more than three miles from the school. She wants to create a 95% confidence interval which has a margin of error of at most 5%. How many students should be polled to create the confidence interval? z0.10 z0.05 z0.025 z0.01 z0.005 1.282 1.645 1.960 2.326 2.576 Use the table of values above.
The following is a list of 14 measurements. - 13, -6, -45, 53, -3, 83, –23, 79, – 17, -96, – 18, 91, 53, – 13 Send data to calculator Send data to Excel Suppose that these 14 measurements are respectively labeled x,, x,, ..., x: (Thus, -13 is labeled x,, -6 is labeled x,, and so on.) Compute the following. 14 Σ 29х, i = 1
According to a poll, 86% of California adults (434 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California. Find a 90% confidence interval for the population proportion. (Round your answers to three decimal places.) X * Enter a number.
Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from $3.37 to $3.60. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample mean and the maximal margin of error E. (Round your answers to two decimal places.) x = $ E = $
During the 2009 holiday season, 436 randomly sampled American adults were surveyed regarding their average spending on Black Friday. A 95% confidence interval based on this sample is ($80.31,$89.11). (c) Determine the sample mean x and the sample standard deviation s of the sample. (d) Which would be the confidence level corresponding to an interval ($81.27,$88.15) for the data found in (c)? (e) If the values of the sample mean and sample standard deviation found in (c) do not change, find the sample size N for which a 99% confidence interval would have a margin of error smaller than 5.
Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from $3.37 to $4.18. Use the fact that the confidence interval for the mean is in the form x − E to x + E to compute the sample mean and the maximal margin of error E. (Round your answers to two decimal places.) x=$ E=$
How do I find confidence levels
How do I find the adjusted confidence level for NORM.S.IN() in excel? What will the adjusted confidence level be for 95% for example. Thx.
Just B please
2. What do Confidence intervals tell us? 3. How can confidence intervals be used in real life?
Abe and Betty want to estimate the mean of a population with known standard deviation o. Abe takes 50 samples whereas Betty takes 80 samples. Which of the following statements are correct? (A) If both Abe and Betty use confidence intervals of the same width, then the confidence level of Abe's interval is smaller than that of Betty's (B) If both Abe and Betty use confidence intervals of the same width, then the confidence level of Abe's interval is larger than of Betty's (C) If Abe and Betty construct confidence intervals with the same confidence level, then the width of Abe's interval is smaller than that of Betty's (D) If Abe and Betty construct confidence intervals with the same confidence level then the width of Abe's interval is larger than that of Betty's (B) and (C). (A) and (D) (B) and (D) (A) and (C)
[Statistics] What is the lower bound of the confidence interval?

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