If random samples of n = 30 are selected from a population with µ = 80 and o = 10, how much distance should we expect betwee the sample means and population mean, on average? 0.25 points not enough information to tell 10 points 1.83 points

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 95​% confidence that the sample mean is within 8 IQ points of the true mean. Assume tha  σ=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 enter your response here. ​(Round up to the nearest​ integer.) Would it be reasonable to sample this number of​ students? Yes. This number of IQ test scores is a fairly small number. No. 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.

112.1Q)The degree of freedom for the chi squared distribution is 12. Find the value of the 92nd percentile of the chi squared distribution. The value is (Round your answer to three decimal places.)

A sumple from a normal population with mu = 50 and sigma = 6 of M=48.20, . the sample mean.corresponds to tz = - 1.50 , then how many scores are in the sample?