Question

The scores of adults on an iq test are approximately normal with mean 100 and standard deviation 15. clara scores 118 on such a test. she scores higher than what percent of all adults

Answer 1

The majority of the scores on the in test are between 85 to 115. This makes the mean 100 and the standard deviation 15. Anyone who scores above or below this range is ether more intelligent or less intelligent then the majority of participants in the test. Since Clara scored 118 she is smarter than most of the adults on this study.