A researcher wanted to determine if the distribution of educational attainment of Americans today is different from the distribution in 2000. The distribution of educational attainment in 2000 was as follows:

Education                                                     Relative Frequency
Not a high school graduate ..................................    0.158
High school graduate ............................................    0.331
Some college ..........................................................    0.176
Associate’s degree .................................................    0.078
Bachelor’s degree ..................................................    0.170
Advanced degree ...................................................    0.087
The researcher randomly selects 500 Americans, learns their levels of education, and obtains the data shown in the table. Do the data suggest that the distribution of educational attainment has changed since 2000? Use the a = 0.1 level of significance.
Education                                                                Frequency
Not a high school graduate ..................................      72
High school graduate ............................................    159
Some college ..........................................................      85
Associate’s degree .................................................      44
Bachelor’s degree ..................................................      92
Advanced degree ..................................................      48