@my.oli.cmu.edu/jcourse/a2/rest/assessement/deliver?attempt=1&context=930152c40a000031416db3d6bb4fd4812Question 3Question 4W# 3Based on the histograms, what is the most likely value of the population mean?A. ○ 0.5B.O 3.0C. 04.5D. 07.5E.O 350Q$4R6Suppose that a candy company makes a candy bar whose weight is supposed to be 50 grams,but in fact, the weight varies from bar to bar according to a normal distribution with mean μ =50 grams and standard deviation o = 2 grams.Countdown: Days:-2 Time:-07:07:1067 5⁰9%If the company sells the candy bars in packs of 4 bars, what can we say about the likelihood that the average weight ofthe bars in a randomly selected pack is 4 or more grams lighter than advertised?A. O There is about a 16% chance of this occurring.B. O There is about a 5% chance of this occurring.C. There is no way to evaluate this likelihood, since the sample size (n = 4) is too small.D. It is extremely unlikely for this to occur; the probability is very close to o.E. O There is about a 2.5% chance of this occurring.5Spring 2023 Statistics For12G Search or type URLT1518^6MacBook Pro21&X247☆Y U*8"Sampling Distributions CheSelect one answer.10 points+(91OOSan

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Answered: If the company sells the candy bars in…

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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I just need help with the LAST step. I am stuck... Please help!!! •.. The equation for determining the sample size n= can be obtained by solving the equation for the margin of error E = z. Show that this is true and justify each step. ...... A. Rewrite the equation by solving for zc. B. Rewrite the equation by solving for n. O C. Rewrite the equation by solving for E. O D. Rewrite the equation by solving for o. Solve the equation for the specified variable. State the operation to be performed and simplify both sides of the equation. E = Z. yn Write the original equation. %3D
.Gentle Ben is a Morgan horse at a Colorado dude ranch. Over the past 8 weeks, a veterinarian took the following glucose readings from this horse (in mg/100ml).93 88 83 105 99 110 87 89Let x be a random variable representing glucose readings taken from Gentle Ben. We may assume that x has a normal distribution, and we know from past experience that ? = 12.8 . The mean glucose level for horses should be ? = 86 mg/100 ml. Do these data indicate that Gentle Ben has an overall average glucose level higher than 86? Use ? = 0.05. d. What sampling distribution will you use? Explain the rationale for your choice of sampling distribution.e. Compute the sample test statistic.f. Using Critical region method, find (or estimate) the critical value. Sketch the sampling distribution and show the area corresponding to the critical region.
1. Tornadoes The claim is that for the widths (yd) of tornadoes, the mean is m 6 140 yd. The sample size is n = 21 and the test statistic is t = -0.024.
1. Identify the null and alternative hypotheses 2. Compute the t-statistic 3. Find the p-value
In the EAI sampling problem, the population mean is $51,400 and the population standard deviation is $4,000. When the sample size isn = 20, there is a 0.4972 probability of obtaining a sample mean within ±$600 of the population mean. Use z-table. a. What is the probability that the sample mean is within $600 of the population mean if a sample of size 40 is used (to 4 decimals)? b. What is the probability that the sample mean is within $600 of the population mean if a sample of size 80 is used (to 4 decimals)?
Suppose the Humane Society claims that 30% of U.S. households own cats. You believe your community is different than the U.S. percentage. To test the claim, you take a simple random sample of 300 households and find that 37% own cats. Test at 5% significance. Round to the fourthH0H0:Select an answer x̄ p̂ μ p Correct Select an answer = < > ≠ Correct CorrectHAHA:Select an answer x̄ p̂ μ p Correct Select an answer = < > ≠ Correct CorrectWhat's the minimum population size required? IncorrectHow many successes were there? CorrectTest Statistic: CorrectP-value: CorrectDid something significant happen? Select an answer Significance Happened Nothing Significant Happened Correct Select the Decision Rule: Select an answer Reject the Null Accept the Null Fail to Reject the Null Correct There Select an answer is is not Correct enough evidence to conclude find the minimum population size required.
65 homeless people in San Jose were asked their age. The sample mean age was 33.2 years. Let x be a random variable representing ages of homeless people in San Jose. Assume that x has a normal distribution and o = 7.3 years. Do the data indicate that the mean age of the population of homeless people in San Jose is less than 35 years old? Use a = 0.05. Identify the following in your answer. 1. Identify the null hypothesis Ho and alternate hypotheses H, for the problem. 2. Identify the sample statistic, test statistic, p-value and calculator key used: Sample Statistic (sample mean) (Stated in problem) = Test Statistic (z) (Round to two decimal places) %3D P-value: (Round to four decimal places) = Calculator key used: 3. Identify the significance level and determine if you reject or fail to reject the null hypothesis. significance level = Do you reject or fail to reject Ho ? 4. State your conclusion. Upload your answer. Remember you can only upload one document. Upload Choose a File
9.13 Given a sample size of 36, how large does the population standard deviation have to be in order for the standard error to be A. 1? B. 2? C. 5? D. 100?
Q4. Identify the incorrect statement below: The estimator, X from a random sample of X A. Is the mean of the population of X. B. Is an unbiased estimator of the population mean. C. Has an expected value equal to the mean of X. D. Is a random variable with a variance smaller than the variance of X. O A. A ОВ. В С. С O D. D

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