Consider an x distribution with standard deviation σ = 39. (a) If specifications for a research project require the standard error of the corresponding x distribution to be 3, how large does the sample size need to be? n =  (b) If specifications for a research project require the standard error of the corresponding x distribution to be 1, how large does the sample size need to be? n =

An IQ test is designed so that the mean is 100 and the standard deviation is 17 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99​% confidence that the sample mean is within 5 IQ points of the true mean. Assume that σ=17 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. The required sample size is

Consider an x distribution with standard deviation σ = 30. (a) If specifications for a research project require the standard error of the corresponding x distribution to be 3, how large does the sample size need to be?n = (b) If specifications for a research project require the standard error of the corresponding x distribution to be 1, how large does the sample size need to be?n =

Consider an x distribution with standard deviation o = 24. (a) If specifications for a research project require the standard error of the corresponding x distribution to be 4, how large does the sample size need to be? n = (b) If specifications for a research project require the standard error of the corresponding x distribution to be 1, how large does the sample size need to be? n =

An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99% confidence that the sample mean is within 4 IQ points of the true mean. Assume that σ=10 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.

An IQ test is designed so that the mean is 100 and the standard deviation is 14 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90​% confidence that the sample mean is within 2 IQ points of the true mean. Assume that σ=14 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation.The required sample size is

An IQ test is designed so that the mean is 100 and the standard deviation is 24 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90% confidence that the sample mean is within 8 IQ points of the true mean. Assume that o = 24 and determine the required sample size using technology. Then determine if this is a reasonable sample size for a real world calculation. ... The required sample size is. (Round up to the nearest integer.) Would it be reasonable to sample this number of students? O No. This number of IQ test scores is a fairly small number. Yes. This number of IQ test scores is a fairly small number. Yes. This number of IQ test scores is a fairly large number. No. This number of IQ test scores is a fairly large number.

Use the central limit theorem to find the mean and standard error of the mean of the indicated sampling distribution. Then sketch a graph of the sampling distribution. The per capita consumption of red meat by people in a country in a recent year was normally distributed, with a mean of 111 pounds and a standard deviation of 37.8 pounds. Random samples of size 19 are drawn from this population and the mean of each sample is determined. 1₂ = 0 ...

Consider an x distribution with standard deviation ? = 20. (For each answer, enter an exact number.) (a)  If specifications for a research project require the standard error of the corresponding  distribution to be 2, how large does the sample size need to be?   (b)  If specifications for a research project require the standard error of the corresponding  distribution to be 1, how large does the sample size need to be?