An IQ test is designed so that the mean is 100 and the standard deviation is 15 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 meari is within 4 1Q points of the true mean. Assume that a= 15 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 intoger) Would it be reasonable to sample this mumber of students? O Yes. This number of 1Q test scores is a fairly small number O Yen. This number of 1Q test scores in a fairty large number. No. This number of IQ test scores is a fairly small number. O No. This number of IQ test scores is a fairly large number

The results of a common standardized test used in psychology research is designed so that the population mean is 155 and the standard deviation is 30. A subject earns a score of 194. What is the z-score for this raw score?z-score =

The results of a common standardized test used in psychology research is designed so that the population mean is 105 and the standard devlation is 30. A subject earns a score of 108. What is the Z-score for this raw score? Z-Score =

A medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. She plans to use statistical methods to estimate the mean of the population of relief times. She believes that the population is normally distributed with a standard deviation of 24 minutes. How large a sample should she take to estimate the mean time to within 3 minutes with 92% confidence? Sample Size =

The sample mean of depression scores of 16 fifth graders was 4.4 with standard deviation of 8. If the population mean of this depression score is 6, what is the calculated t score for this sample?

Calculate the estimated standard error for the case where the sample standard deviation is 25 and the sample size 137. Answer to three decimal places if necessary, you may round up or down.

The results of a common standardized test used in psychology research is designed so that the population mean is 165 and the standard deviation is 30. A subject earns a score of 255. What is the z-score for this raw score?z-score =

The results of a common standardized test used in psychology research is designed so that the population mean is 100 and the standard deviation is 40. A subject earns a score of 192. What is the Z-score for this raw score? Z-Score =