Consider the observed frequency distribution for the following set of grouped random variables:

Random Variable, x              Frequency, f_o

Less than 80 ……………………       10

80 to under 100 …………………      14

100 to under 120 ………………        19

120 and more ……………………      7

Total …………………………….      50

Perform a chisquare test using α = 0.05 to determine if the observed frequencies follow the normal probability distribution with μ = 100 and σ = 20.