An independent consumer group published its finding that the lifetimes of electric bulbs manufactured byBIG Corporation are approximately normally distributed with a mean of 680 days and a standard deviation of125. BIG Corporation claims that the standard deviation of its electric bulbs is less than 125. Suppose that wewant to carry out a hypothesis test to see if BIG Corporation's claim is correct. State the null hypothesis Hoand the alternative hypothesis H₁ that we would use for this test.Ho: DH₁: DнOSOOX0>0ロ=ロ 0#0РSO

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Answered: re approximately normally distributed…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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13. What is the null hypothesis for the following statement? The average teenager drinks at least 10 cans of soda per week. Αμ > 10 Bu = 10 C με 10 Dμ 210 14. The mileage of returned leased vehicles at a local dealership is normally distributed with a mean of 34,600 and a standard deviation of 3200. What percent of the vehicles are returned with fewer than 30,000 miles? F 5% G 7.5% H 84.9% J 92.5% 15. COMMUTERS Which group should be surveyed to determine how people commute to work in order to produce a random sample? A students in your school B people passing through a toll booth on a given day C people in your state whose last name begins with S D people whose annual income is greater than $1,000,000
Q1: Lifetimes of a certain component are lognormally distributed with parameters u = 1 day and o = 0.5 days. Find the mean lifetime of these components. 1-Find the standard deviation of the lifetimes. 2-Find CDF 3- Find reliability at t= 4 day
10 = You wish to test Ho: μ₁ = μ₂ versus Ha:μ₁ μ2 at a = 0.05. You obtain a sample of size ni with a mean of ₁ 73.8 and a standard deviation of s₁ = 17.5 from the first population. You obtain a sample of size n₂ 6 with a mean of 2 55.3 and a standard deviation of s2 8.7 from the second population. Assume that the populations are normal with equal variances. Do not round interim calculations. Round your final answers to three decimal places. (a). Find the test statistic: = (c). You reject (b). Using your answer from (a), find the p-value: - (d). There is sufficient second population mean o the null hypothesis. = evidence to conclude the first population mean is not equal to the
Question 5 of 5 -/1 View Policies Show Attempt History Current Attempt in Progress Suppose that x has a beta distribution with parameters a = 2.3 and B = 1. Determine to 4 decimal places the following: a. P(X < 0.23) i b. P(0.23 < X < 0.83) i c. Mean i d. Variance eTextbook and Media Save for Later Attempts: 0 of 3 used Submit Answer Activate Go to Settin I!
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A psychologist developed a standardized test for selecting “gifted” children. In the population, the test scores are normally distributed, with μ=75μ=75 and σ=10σ=10. We randomly sampled 49 gifted students and found out the mean test score of these 49 students is 77. Over repeated samples (with a fixed n=49n=49), what is the probability of getting a sample mean that is equal to or greater than the one we got? A. 0.42074 B. 0.91924 C. 0 D. 0.57925 E. 0.08076
You may have a random variable Y with μ₂ = 0 and μ₃ = 1. 81°F Mostly cloudy Q Search
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Please see attached statistical mathematics question. How to find the constant c so that the signicance level is alpha = 0.05.and determine the power function of the test?
You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=57.4σ=57.4. You would like to be 99.5% confident that your esimate is within 1 of the true population mean. How large of a sample size is required?n = Do not round mid-calculation. However, use a critical value accurate to three decimal places — this is important for the system to be able to give hints for incorrect answers.
Question 12 Calculate the standard deviation of X. 6 P(X) 0.4 0.6 MacBook Pro 888 #3 $ & 3 4 7 8. E Y U F G J K C V M V エくO ト

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re approximately normally distributed with a mean of 680 days and a ion claims that the standard deviation of its electric bulbs is less tha a hypothesis test to see if BIG Corporation's claim is correct. State t e hypothesis H₁ that we would use for this test. μ