The chance of developing breast cancer is under 11% for women. Type I error: We conclude that the proportion of women who develop breast cancer is less than 11%, when in fact it is less than 11%. We conclude that the proportion of women who develop breast cancer is less than 11%, when it is really at least 11%. We conclude that the proportion of women who develop breast cancer is at least 11%, when it is really at least 11%. We conclude that the proportion of women who develop breast cancer is at least 11%, when in fact it is less than 11%. Incorrect: Your answer is incorrect. Type II error: We conclude that the proportion of women who develop breast cancer is less than 11%, when in fact it is less than 11%. We conclude that the proportion of women who develop breast cancer is less than 11%, when it is really at least 11%. We conclude that the proportion of women who develop breast cancer is at least 11%, when it is really at least 11%. We conclude that the proportion of women who develop breast cancer is at least 11%, when in fact it is less than 11%