TASK 3A sample of 500 observations taken from the first population gave x = 305 Anothersample of 600 observations taken from the second population gave x, = 348a) Find the point estimate of P.-P: -b) Make 97% confidence interval for P. -P..

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Answered: A sample of 500 observations taken from…

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 pulse rates of 176 randomly selected adult males vary from a low of 40 bpm to a high of 116 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 95% confidence that the sample mean is within 2 bpm of the population mean.
suppose a random sample of 25 observation from a normal population with standard deviation 6. Also the sample mean is 20. Find 90% confidence interval for the population mean.
A 95% confidence interval was calculated to be (15, 21). This means that if 100 such confidence intervals (CIs) were constructed, then 95% of the CIs will be (15,21) 95% of the CIs will include the population mean The population mean would lie between (15,21) 95 times. The population mean would be found in about 95 of the CIs.
A certain counselor wants to compare mean IQ scores for two different social groups. A random sample of 15 IQ scores from group 1 showed a mean of 117 and a standard deviation of 17 , while an independently chosen random sample of 9 IQ scores from group 2 showed a mean of 112 and a standard deviation of 15 . Assuming that the populations of IQ scores are normally distributed for each of the groups and that the variances of these populations are equal, construct a 90% confidence intervalfor the difference −μ1μ2 between the mean μ1 of IQ scores of group 1 and the mean μ2 of IQ scores of group 2 . Then find the lower limit and upper limit of the 90% confidence interval. Carry your intermediate computations to at least three decimal places. Round your responses to at least two decimal places. (If necessary, consult a list of formulas.)
Why should a confidence interval for p fall between (0, 1) while it makes sense for a confidence interval for Pi - p2 to fall between (-1, 1)?
In an unpaired two-sample problem an experimenter observes n=14, x= 32.45, s× = 4.30, from %3D population A, and m=14, ỹ = 41.45, sy =5.23, from population B. Please set up the 99% confidence interval for difference of the population means. (-14.04, -3.96) (-14.02, -3.94) (-14.00, -3.92) (-13.98, -3.90) (-13.96, -3.92)
Given are five observations for two variables, x and y.
Calculate the point estimate.
If n=550 and p' (p-prime) = 0.19, construct a 90% confidence interval.Give your answers to three decimals.
In a factory the 95% confidence interval of the mean net weight of the chocolates produced was estimated. Based on a random sample of 400 chocolates the mean net weight is between 99 grams and 101 grams. Give the maximum error of the estimate in grams.

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A sample of 500 observations taken from the first population gave x = 305 Another sample of 600 observations taken from the second population gave x, = 348 a) Find the point estimate of p, - P . b) Make 97% confidence interval for P, - P2.