The diameter of a ring is known to have a normal distribution with standard deviation of0.05 inch. A random sample of 20 rings have an average diameter of 2.1015 inch. What isthe 95% two-sided confidence interval for the population mean diameter of rings.(1.0781, 2.1249)(2.0781, 2.1249)(-2.0781, -2.1249)Cannot detemine with thed)giveninformation.Answer

From the provided information, Sample size (n) = 20 Sample mean (x̄) = 2.1015 inch Population…

Answered: The diameter of a ring is known to have…

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 sample size needed to estimate a population mean within 1.5 units with a 99% confidence when the population standard deviation equals 8 is: о а. 14 O b. 110 с. 189
The law of large numbers states that as the number of observations drawn at random from a population with finite mean increases, the mean of the observed values: a. tends to get closer and closer to the population mean . b. gets smaller and smaller. c. gets larger and larger. d. fluctuates steadily between 1 standard deviation above and 1 standard deviation below the mean. I collect a random sample of size n from a population and compute a 95% confidence interval for the proportion I observe from the population. What could I do to produce a new confidence interval with a larger width (larger margin of error) based on these same data? a. I could use the same confidence level but compute the interval n times; approximately 5% of these intervals will be larger. b. Nothing can guarantee absolutely that I will get a larger interval; I can only say the chance of obtaining a larger interval is 0.05. c. I could use a smaller confidence…
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