The banking industry claimed that 80% of its customers aged over 65 used computers at home to make regular bill payments online for such things as electricity, gas and telephone. An independent research company decided to test this claim. A random sample of 150 bank customers over age 65 was selected, with 109 found to make regular bill payments online. Using a 5% level of significance, is there sufficient evidence to conclude that the proportion is significantly less than the 80% claimed by the banking industry?