Americans appear to be eating healthier Between 1970 2007 t

Americans appear to be eating healthier. Between 1970 & 2007 the per capita consumption of broccoli increased 1000% from 0.5 to 5.5 pounds. A nutritionist followed a group of people randomly assigned to three groups and noted their monthly broccoli intake (in pounds). At a = 0.10 is there a differences in means?

Group A                      Group B               Group C       

               1.3                               3.6                       2.9

             1.2                               1.4                       2.6

               1.1                               1.1                       4.4

               1.7                               1.2                       3.1

               1.8                              1.0                       1.1

               1.4                               3.9                        1.7

Solution

H0: There is no difference in means between three groups

Ha: There is difference

Prep chi square table

The three groups are not alike.
They have diferent means.