Cora, her sister, and four friends are going to share a bag of candy equally. There are 120 candies in the bag. How many candies
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Answer:
0.14917
Step-by-step explanation:
We have been given that adults have IQ scores that are normally distributed with a mean of 95.6 and a standard deviation of 19.5. We are asked to find the probability that a randomly selected adult has an IQ greater than 115.9.
First of all, we will find z-score corresponding to 115.9 using z-score formula.
, where
z = z-score,
x = Random sample score,
= Mean,
= Standard deviation.
Upon substituting our given values in z-score formula, we will get:
Now, we will use normal distribution table to find the .
Using formula , we will get:
Therefore, the probability that a randomly selected adult has an IQ greater than 115.9 is 0.14917 or approximately 14.92%.