Author Question: The sample mean, x , is a statistic. A) True B) False[br][br][b][color=#9E3EA8]Question ... (Read 88 times)

lidoalex · **on:** Jun 24, 2018

The sample mean, x , is a statistic.

A) True B) False

Question 2

A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 460 seconds and a standard deviation of 40 seconds. The fitness association wants to recognize the fastest 10 of the boys with certificates of recognition. What time would the boys need to beat in order to earn a certificate of recognition from the fitness association?

A) 511.2 seconds B) 525.8 seconds C) 394.2 seconds D) 408.8 seconds