### (1 point) Suppose that scores on a standardized test in mathematics taken by students from large and small high schools are ( Nleft(mu_{X}, sigma^{2}right) ) and ( Nleft(mu_{Y}, sigma^{2}right) ), respectively, where ( sigma^{2} ) is unknown. If a random sample of ( n=9 ) students from large high schools yielded ( bar{x}=89.42,

(1 point) Suppose that scores on a standardized test in mathematics taken by students from large and small high schools are ( Nleft(mu_{X}, sigma^{2}right) ) and ( Nleft(mu_{Y}, sigma^{2}right) ), respectively, where ( sigma^{2} ) is unknown. If a random sample of ( n=9 ) students from large high schools yielded ( bar{x}=89.42,