An Izod impact test was performed on 20 specimens of PVC pipe. The sample mean is x = 1.04 and the sample standard deviation iss = 0.23. Compute a 99% tolerance interval on the impact strength of PVC pipe that has confidence level 90%. Assume population isapproximately normally distributed.Round your answers to 3 decimal places.i

It is given that Sample mean = 1.04Same standard deviation = 0.23Sample size = 20Confidence level =…

Answered: An Izod impact test was performed on 20…

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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Matthew wants to estimate the mean fat content of a pack of potato chips manufactured by UniBee Foods. He wants to be 90% confident that the estimate is accurate within 0.5 mg. Old records showed a 1.2 mg standard deviation. What should be the minimum sample size that he needs to construct this estimate?
Body temperatures are from a Normal Distribution with a mean of ?? = 97.8° and a standard deviation of ?? = 0.8°. What temperature has a z-score of z = - 1.25? Please help
One of the measurements used to determine the health of a person's lungs is the amount of air a person can exhale under force in one second. This is called forced expiratory volume in one second, and is abbreviated FEV,. Assume the mean FEV, for 10-year-old boys is 2.1 liters that the population standard deviation is o =0.2. A random sample of 53 10-year-old boys live in a community with high levels of ozone pollution are found to have a sample mean FEV, of 2.09 liters. Can you conclude that the mean FEV, in the high-pollution community differs from 2.1 liters? (A) Yes (B) No
to qualify for a police academy, applicants are given a test of physical fitness. The scores are normally distributed with a mean of 66 and a standard deviation of 10 . If only the top 13% of the applicants are selected, find the cutoff score. Round z-value calculations to 2 decimal places and the final answer up to the nearest whole number. Cutoff score
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Please solve within 30 minutes with a correct explanation.
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The sample mean of depression scores of 16 fifth graders was 4.4 with standard deviation of 8. If the population mean of this depression score is 6, what is the calculated t score for this sample?
The average IQ level in the United States is 98 (standard deviation of 4). A sample of 200 people was selected from the city of Loma Linda and had an IQ average of 105. Assuming an alpha of 0.05, is the sample mean significantly greater than the population mean? 1. List the 5 steps needed for the hypothesis testing. Do not forget to make your conclusion in step 5. 2. Compute and interpret the effect size. Edit View Insert Format Tools Table 12pt ✓ Paragraph BIUA ✓ T² v
a sugar company packages sugar in 5kg bags. the amount of sugar per bag varies according to a normal distribution. a sample of 25 bags is selected from the days production and the mean for the day is 4.98 kg and the standard deviation is 0.05 kg. ( use 1-a= 0.95 ) the margin of error for the amount of sugar is?
From generation to generation, the mean age when smokers first start to smoke varies. However, the standard deviation of that age remains constant around 2.1 years. A survey of 40 smokers of this generation was done to see if the mean starting age is at least 19. The sample mean was 18.1 with a sample standard deviation of 1.3. Does the data support the claim at the 5% level? (Give the p-value, your decision, the reason for your decision and your conclusion)
How can get the standard deviation within the measures of dispersion or variability ?

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