Math Solutions

[See Solution] QUESTION: The scores on a physical-performance test for boys of junior high school age have been standardized with a mean of 175 and a standard

QUESTION: The scores on a physical-performance test for boys of junior high school age have been standardized with a mean of 175 and a standard deviation of 12 for the general population. In a large city school system, a random sample 225 junior high school boys is tested. The sample mean is 173.6. Calculate the 95% confidence interval for the population. Is the population mean (175) within the interval?

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