Question

Colleen received a score of 100 on an IQ test. The mean for the test is 100 and the standard deviation is 15. Assume the test had a normal distribution of scores. Colleen’s score on the test was equal to or greater than the scores of what percent of people?

Answer 1

Answer:

B) 50

Step-by-step explanation:

That's the part that I'm not sure about I wish I could explain it to you. Just know that is the right answer though.

Answer 2

Colleen’s score on the test was equal to or greater than the scores of 50% percent of people

The test score is said to follow a normal distribution, and the given parameters are:

Score = 100

Standard deviation = 15

Mean score = 100

Start by calculating the z-score using:

$z = \frac{x - \bar x}{\sigma}$

So, we have:

$z = \frac{100- 100}{15}$

$z = 0$

Calculate the p value when z = 0.

From z table of probabilities, we have:

p = 0.5 when z >= 0

Represent as percentage

p =50%

Hence, Colleen’s score on the test was equal to or greater than the scores of 50% percent of people

Read more about normal distribution at:

https://brainly.com/question/4079902