Question

A random sample of 78 eighth grade​ students' scores on a national mathematics assessment test has a mean score of 286. This test result prompts a state school administrator to declare that the mean score for the​ state's eighth graders on this exam is more than 280. Assume that the population standard deviation is 39. At alphaequals0.06​, is there enough evidence to support the​ administrator's claim? Complete parts​ (a) through​ (e). ​(a) Write the claim mathematically and identify Upper H 0 and Upper H Subscript a. Choose the correct answer below. A. Upper H 0​: mugreater than or equals280 ​(claim) Upper H Subscript a​: muless than280 B. Upper H 0​: muless than or equals280 ​(claim) Upper H Subscript a​: mugreater than280 C. Upper H 0​: muequals280 ​(claim) Upper H Subscript a​: mugreater than280 D. Upper H 0​: muless than or equals280 Upper H Subscript a​: mugreater than280 ​(claim) E. Upper H 0​: muless than280 Upper H Subscript a​: mugreater than or equals280 ​(claim) F. Upper H 0​: muequals280 Upper H Subscript a​: mugreater than280 ​(claim)

Answer 1