Q7 You wish to test the following claim (Ha) at a significance level of a=0.002 Ho: μ-53.6 На: »53.6 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=91 with mean M=54.2 and a standard deviation of SD=11.2 What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =

Q7 You wish to test the following claim (Ha) at a significance level of a=0.002 Ho: μ-53.6 На: »53.6 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=91 with mean M=54.2 and a standard deviation of SD=11.2 What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value =

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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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The population standard deviation for the heights of dogs, in inches, in a city is 3.7 inches. If we want to be 95% confident that the sample mean is within 2 inches of the true population mean, what is the minimum sample size that can be taken? z0.101.282z0.051.645z0.0251.960z0.012.326z0.0052.576 Use the table above for the z-score, and be sure to round up to the nearest integer.
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A division-wide aptitude test in Mathematics was conducted to 1 000 pupils. The mean ofthe test is 58 and the standard deviation is 12. The scores also approximate the normaldistribution. 17. What is the minimum score that belongs to the upper 10% of the group?18. What are the two extreme scores outside of which 5% of the group are expected to fall?19. What is the score that divides the distribution into two such that 75% of the cases is below it?20. Estimate the range of scores that will include the:a. Middle 50% of the distributionb. Middle 99% of the distribution
A population has an average of 200 with a standard deviation of 25. A random sample of 64 items is chosen. What is the smallest interval that will contain 91.46% of the sample means? Standard error (3 decimal places) = Z = Larger sample mean (1 decimal place) = Smaller sample mean (1 decimal place) =
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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?
We wish to determine the average IQ score for the population of biology students with a known population standard deviation of 20 points. How many biology students must be randomly selected for IQ tests if we want 99% isn't z_c for 0.01 = -2.3263?confidence that the sample mean is within 5 IQ points of the population mean?
Experimental components for use in aircraft engines were tested to destruction under extreme conditions. The survival times, in days, of ten components were tested. The mean survival time was determined to be 445.5 days with a standard deviation of 120 days. The experimental components manufactured by the company report that the mean survival time is 430 days. Is there a significant difference between the sample and the claim? Evaluated on a TI 83 calculator
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Compute the standard error for the sample mean \bar xxˉ from a SRS of 16 observations with sample standard deviation s =s= 11.5. Round your answer to 3 decimal places.