A teacher wants to know if her students spend more money on their lunches than the national average (μ = $2.48). Her 20 students spend an average of $3.50 (Ŝ = XXXXXXXXXXAssuming an alpha of .05, do...

A teacher wants to know if her students spend more money on their lunches than the national average (μ = $2.48). Her 20 students spend an average of $3.50 (Ŝ = 1.20). Assuming an alpha of .05, do her students spend significantly more on lunch than the national average?