THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

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.
-A recent survey examined the first-year salaries of 178 MBA graduates.The kurtosis for this data set was calculated to be 3.56,with a skewness of 0.29.Is there sufficient evidence to reject the null hypothesis that first-year salaries for MBA graduates are normally distributed?