A North American mole weighs an average of 3.5 oz.with a standard deviation of 0.9 oz.and a distribution that is approximately normal.In what percentile is the weight of a mole that weighs 4.25 oz.?
A)20.2%
B)79.8%
C)6.022%
D)17.7%
E)83.3%

Question

Quizplus · Accepted Answer

To find the percentile of a mole that weighs 4.25 oz., we first calculate its z-score using the formula z = (X - μ) / σ, where X is the value (4.25 oz.), μ is the mean (3.5 oz.), and σ is the standard deviation (0.9 oz.). This gives us z = (4.25 - 3.5) / 0.9 ≈ 0.833. Looking up this z-score in a standard normal distribution table or using a calculator, we find that it corresponds to a percentile of approximately 79.8%, which is option B.

A North American Mole Weighs an Average of 3