Bob's z-score for the last exam was 1.52 in Prof. Axolotl's class BIO 417, "Life Cycle of the Ornithorhynchus." Bob said, "Oh, g

Question

3 years ago

8

ood, my score is in the top 10 percent." Assuming a normal distribution of scores, is Bob right?

1 answer:

poizon [28] · Answer 1 · 2022-03-11T18:16:21+03:00

Answer:

yes

Step-by-step explanation:

The 90-th percentile of a normal distribution corresponds to a z-score of 1.282. Bob's z-score is above that, so he is definitely in the top 10%.

_____

If you haven't memorized the percentiles associated with the normal distribution, it is convenient to use a calculator or table of values.