A paper reported that for a group of 76 college students, the average number of responses changed from the correct answer to an incorrect answ multiple-choice items was 0.9. The corresponding standard deviation was reported to be 1.0. Based on this mean and standard deviation, what ca of the distribution of the variable number of answers changed from right to wrong? Since the mean of the distribution is 0.9 answers changed and the standard deviation is 1.0 answers changed, 0 answers changed is 0.9 ✔ standard deviations below the mean. If the distribution were approximately normal, then we would expect about 16% change fewer than 0 answers. Thus the distribution cannot ✔ be well approximated by a normal curve. There must be some values mor ✓ answers changed. This suggests that the distribution is positively: 1 standard deviation above the mean, that is, values above 1.9 How many standard deviations above the mean is three answers changed? 2.1 What can you say about the total number of students who changed at least three answers from correct to incorrect? (Round your answer down to number.)