True or false? The value zc is a value from the standard normal distribution such that P(-zc < z < zc) = c. False. By definition, critical values zc are such that c% of the area under the standard normal curve falls in the tails, to the left of -zc and to the right of zc. True. By definition, critical values zc are such that c% of the area under the standard normal curve falls in the tails, to the left of -zc and to the right of zc. True. By definition, critical values zc are such that c% of the area under the standard normal curve falls between -zc and zc. False. By definition, critical values zc are such that c% of the area under the standard normal curve falls between -zc and zc. True or false? The point estimate for the population mean of an x distribution is x, computed from a random sample of the x distribution. True. The mean of the x distribution equals the mean of the x distribution and the standard error of the x distribution increases as n increases. False. The mean of the x distribution does not equal the mean of the x distribution and the standard error of the x distribution increases as n increases. True. The mean of the x distribution equals the mean of the x distribution and the standard error of the x distribution decreases as n increases. False. The mean of the x distribution does not equal the mean of the x distribution and the standard error of the x distribution decreases as n increases True or false? Every random sample of the same size from a given population will produce exactly the same confidence interval for . False. Different random samples may produce different x values, resulting in different confidence intervals. True. Different random samples will produce the same x values, resulting in the same confidence intervals. False. Different random samples may produce different x values, resulting in the same confidence intervals. True. Different random samples may produce different x values, resulting in different confidence intervals True or false? If the sample mean of a random sample from an x distribution is relatively small, then the confidence interval for will be relatively short. True. The maximal error of estimate controls the length of the confidence interval dependent on the value of x. False. The maximal error of estimate controls the length of the confidence interval regardless of the value of x. True. The maximal error of estimate controls the length of the confidence interval regardless of the value of x . False. The maximal error of estimate controls the length of the confidence interval dependent on the value of x