If it costs a Dollar to draw one number of a sample, how much would it cost in sam-pling from a universe with mean 100 and standard deviation 10 to take sufficient number as to ensure thatthe mean of a sample would in a 5 per cent probability be within 0.01 per cent of the true value? Find theextra cost necessary to double this precision.

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Answered: If it costs a Dollar to draw one number…

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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Similar questions

If random samples, each with n = 16 scores, are selected from a normal population with µ = 100 and σ = 20, how much difference, on average, should there be between a sample mean and the population mean?
For a normally distributed population with a mean of 35 and a standard deviation of 7.5, what value of X would be exceeded only 10% of the time?
. A population of 1143 has a mean of 10.0 and a standard deviation of 1.5. If we draw a simple random sample of size 76, what is the probability that the sample mean x̅ will be greater than three sixth of 9 but less than 31% of population mean
2: If the variance of a national accounting examination is 900, how large a sample is needed to estimatethe true mean score within 5 points with 99% confidence?
Suppose we know that the mean score among the population of college students taking the GMAT test is 1000. If the population standard deviation is 1200, and we take a sample of size 100, then what percentage of possible sample means that could be drawn from this population will be less than 1300?
Suppose a random sample of 4949 measurements is selected from a population with mean 6060 and standard deviation 1010. Step 2 of 2: Find the standard deviation of the sampling distribution of sample means using the given information. Round to two decimal place, if necessary.
the standard deviation of a set of 12 measurements has a numerical value of 3. If one of the measurements, equal to the mean,is removed from the data set , then the magnitude of the Variance is
There are many situations in which we want to compare means from populations having standard deviations that are equal. This method applies even if the standard deviations are known to be only approximately equal. Consider a report regarding average incidence of fox rabies in two regions. For region I, n1 = 16, x1 ≈ 4.73, and s1 = 2.84 and for region II, n2 = 15, x2 ≈ 3.93, and s2 = 2.45. The two sample standard deviations are sufficiently close that we can assume ?1 = ?2. Use the method of pooled standard deviation to consider the report, testing if there is a difference in population mean average incidence of rabies at the 5% level of significance. (Round your answer to three decimal places.) t =
In order to have the standard error of the mean be 6, one would need to take a sample of size from a normally distributed population with a standard deviation of 42
A rugby team from the country of Atlantis is formed by randomly drawing from its population. The population distribution is normally distributed with a mean of 165 cm and a standard deviation of 10 cm. The team draws 26 people for the team. Given a population mean of 165cm, how many standard deviations would a sample mean of 163cm be from the true value? Give your answer rounded to two decimal places.
Dr. Sylvester Stallone is a circadian rhythms researcher and believes sleep affects memory. Having collected data on a large number of subjects who are getting the recommended amount of sleep, he knows the mean digit span of this population is 5.6 digits. To test his hypothesis, he measures the digit span of 15 volunteers randomly selected from the population, after depriving them of one night’s sleep. The results show a mean (X bar) of 4.1 and a standard deviation of (s) 1.4. a. What does Dr. Stallone conclude, using and alpha of 0.05 (two tailed)? b. If appropriate, calculate the size of effect and provide an interpretation of the value?

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