The following data has been provided for you to analyze813104.1328(a) Find the sample mean of X, Mark your answer here 13(b) Find the sample variance of X. Mark your answer here 10(c) Assume that the X, form a random sample from a normal distribution with mean a and a standarddeviation of 12. Provided a 90 percent confidence interval for u.Confidence Interval = ( NumberNumber) Round 3 decimals(d) Under the same assumptions, test the hypothesis that Ho : S 6 against the alternativeH:p > 6 at 10 percent significance level. Should we reject the null and favor the alternative ?O falseO ture

Here AS PER POLICY I HAVE CALCULATED 3 SUBPARTS Here sample size = 5

Answered: (a) Find the sample mean of X, Mark…

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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A population of values has a normal distribution with �=17 and �=56.9. You intend to draw a random sample of size �=227.What is the mean of the distribution of sample means?��¯= What is the standard deviation of the distribution of sample means?��¯= Round to 4 decimal places.
Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 12. Use the empirical rule to determine the following. (a) What percentage of people has an 1Q score between 64 and 136? (b) What percentage of people has an IQ score less than 76 or greater than 124? (c) What percentage of people has an IQ score greater than 124?
Which procedure is preferred if the procedure must be complete in 26 minutes.
Part Variability is critical in the manufacturing of the ball bearings. Large variances in the size of the ball bearings cause bearing failure and rapid wear out. Production standards call for a maximum variance of .0001 when the bearing sizes are measured in inches. A sample of 15 bearings shows a sample standard deviation of .014. a. Compute the 90% confidence interval estimate of the variance of the ball bearings in the population. b. Use a= 0.10 to determine whether the sample indicates that the maximum acceptable variance is being exceeded. Use critical value approach. ( Note: You must state null and alternative hypotheses, compute the test statistic, Report the critical Value, and draw a conclusion.
Times for a surgical procedure are normally distributed. There are two methods. Method A has a mean of 21 minutes and a standard deviation of 5 minutes, while method B has a mean of 25 minutes and a standard deviation of 25 minutes. (a) Which procedure is preferred if the procedure must be completed within 23 minutes? O Method A O Method B O Either Method (b) Which procedure is preferred if the procedure must be completed within 32.0 minutes? O Method A O Method B O Either Method (c) Which procedure is preferred if the procedure must be completed within 29 minutes? OMethod A O Method B O Either Method Next Prey 19 of 19 here to search op t9 144 14 ou ts 47 47 to 40 16 is 券

Question Heip How do the requirements for a chi-square test for a variance or standard deviation differ from a z-test or a t-test for a mean? Choose the correct answer below. OA A chi-square test can only be used when the population has a normal distribution. On the other hand, a z-test or a t-test can only be used when the sample size is at least 30. O B. A chi-square test can only be used when the population has a normal distribution. On the other hand, a z-test or a t-test can be used when either the population has a normal distribution or the sample size is at least 30. O C. Az-test or a t-test can only be used when the population has a normal distribution. On the other hand, a chi-square test can be used when either the population has a normal distribution or the sample size is at least 30. O D. Az-test or a t-test can only be used when the population has a normal distribution. On the other hand, a chi-square test can only be used when the sample size is at least 30. Click to…
Which procedure is preferred if the procedure must be completed within 32 minutes
The number of peanuts in a 16 ounce can of nut munchies is normally distributed with a mean of 93.6 and a standard deviation of 4.2 peanuts the number of peanuts in a 20 ounce can of gone nuts is normally distributed with a mean of 111.8 and a standard deviation of 3.4 peanuts. (a) Carmen purchased a 16 ounce can of nut munchies and counted 100 peanuts what is the Z score for this can of peanuts? (b) Angelo purchased a 20 ounce can of gone nuts and counted 116 peanuts what is the Z score for this can of peanuts? (c) Carmen declares that purchase purchasing her can of nut munchies with 100 peanuts is less likely than Angelo purchasing a can of gone nuts with 116 peanuts is Carmen statement correct? Use the definition of a Z score to support or refute Carmen's claim.
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Determine your test statistic: either use a z-test or t-test• There are three key questions to ask: Is the variance of the population known? Is the distribution of the population normal (or approx. normal)? Is the sample size large?1. When the variance is known and either the distribution is normal or sample size is large,use a z-test statistic2. When the variance is unknown and a sample size less than 30, use a t-test statistic aslong as the population is normal (or approx. normal)?
Can you please check my work

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