A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was 1468 and the standard deviation was 319 . The test scores of four students selected at random are ​1870, 1230​,2200 ​, and 1350. Find the​ z-scores that correspond to each value and determine whether any of the values are unusual.

Aprofessional hockey team has noticed that, over the past several seasons, as the number of wins increases, the total number of hot dogs sold at the concession stands increases. the hockey team concludes that winning makes people crave hot dogs. what is wrong with the hockey team's conclusion? a) it does not take into account the attendance during each season. b) it does not take into account the number of hamburgers sold during each season. c) it does not take into account the number of concession stands in the hockey arena. d) it does not take into account the number of seasons the hockey team has been in existence.