THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

question 154

Essay

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
An airline is considering changing the color scheme of its planes' interiors.A focus group of 220 people was asked which color scheme they preferred.Of those who expressed a preference,87 preferred the new color scheme,while 121 preferred the old.
-The following table provides the score on a performance evaluation of employees when first hired,and one year later.
Employee

Using the Wilcoxon signed rank test,is there evidence that the employees' evaluations improved over their first year?