Analysis of Variance (ANOVA) was used to compare the mean levels of health care expenditures per person among workers randomly selected from three different types of employers (manufacturing, academic, and U.S. Federal government). The Type I error for the test (a-level) was set at .05, and the p-value was < .01. Based on these results, the researchers would decide:

a. The true mean health care expenditures are statistically significantly different between all 3 employee groups.

b. The mean health care expenditures for employees of manufacturing companies is statistically significantly larger than health care expenditures for employees of academia.

c. The mean health care expenditures for employees of academia is statistically significantly smaller than the mean health care expenditures for employees of the U.S. Federal government.

d. At least one of the three groups of employees has a statistically significantly different