Suppose that you go to a NJ lake to grab water samples to test algal concentrations using a cellcounter. That instrument is certified to have a minimum detectable relative difference of 10%. Thewater sample testing result shows that the mean algal number is 1500 #/ml with a standarddeviation of 250 #/ml. Roughly how many samples are required at least to be collected at aconfidence level of 95% and power of 90%?O 5O 10O 15O 21

Given information- Population standard deviation, σ = 250 ml Confidence interval = 0.95 Significance…

Answered: Suppose that you go to a NJ lake to…

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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2. During method validation, an analyst tries to assess the trueness of an analytical procedure using a CRM. The mean and standard uncertainty of 5 repeated measurements were 100 ppm and 2 ppm. If the certified is 108 ppm with standard uncertainty of 2 ppm, is there any statistical evidence of inaccuracy at 0.05 significance level. Given that to = 2.776. (t = 2.83)
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 43 feet. Assume the population standard deviation is 4.6 feet. The mean braking distance for Make B is 46 feet. Assume the population standard deviation is 4.5 feet. At α=0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. The critical value(s) is/are Find the standardized test statistic z for μ1−μ2.
If X = 122, o = 25, and n = 30, construct a 95% confidence interval estimate of the population mean, μ. sus
pls. answer using 7 steps:-Parameter of interest-Null hypothesisAlternative hypothesis -Test statistic -Reject H0 if: -Computations: -Conclusion
By measuring the amount of time it takes a component of a product to move from one workstation to the next, a technologist has estimated that the standard deviation is 5.00 seconds. What sample size should be used in order to be 95% certain that the mean transfer is estimated to within ±1.00 seconds?
The average zinc concentration recovered from a sample of measurements taken in 40 different locations in a river is found to be 2.5 grams per milliliter. How large a sample is required if we want to be 95% confident that our estimate of ? is off by less than 0.05. Assume that the population standard deviation is 0.25 gram per milliliter.
Assume that a sample is used to estimate a population proportion μμ. Find the margin of error M.E.that corresponds to a sample of size 84 with a mean of 79.2 and a standard deviation of 6.1 at a confidence level of 99.9%.Report ME accurate to one decimal place because the sample statistics are presented with this accuracy.
The pulse rates of 168 randomly selected adult males vary from a low of 39 bpm to a high of 111 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 98% confidence that the sample mean is within 2 bpm of the population mean. Complete parts (a) through (c) below
(3) If you are evaluating two different sets of measurements 0.952(7) atm and 0.977(5) atm. Are they statistically equivalent?
Assume that a sample is used to estimate a population mean μμ. Find the margin of error that corresponds to a sample of size 16 with a mean of 68.3 and a standard deviation of 17.9 at a confidence level of 99%.Report the margin of error accurate to one decimal place because the sample statistics are presented with this accuracy.E=
These are the numbers I am working with: Sample mean= 78 Population mean= 75 Standard deviation:=10 Significance level: .05 Critical value: Z score > 1.96 Z score= 1.34 How do I figure the confidence limits for the 95% confidence interval. Z-score= 1.34 P-value= .1802
A population has mean u = 26 and standard deviation o= 22. Find u, and o- for samples of sizen=100. Round your answers to one decimal place if needed.

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