Question 41

1)Assume IQ scores are normally distributed in the population with a mean of 100 and a standard deviation of 15. A person's IQ score is 115. Calculate their z-score.(Answer correct to 3 decimal places)

2) Calculate the z-score for a person who has an IQ score of 83.(Answer correct to 3 decimal places)

3) A person's z-score for IQ is calculated to be 2.34. What is their IQ?(Answer correct to a whole number)

4) A person's z-score for IQ is calculated to be -1.75. What is their IQ?(Answer correct to a whole number)

5)If you take a random person from the population, what is the probability their IQ score is less than 100?(Answer correct to 2 decimal places)

6) If you take a random person from the population, what is the probability their IQ score is less than 80?(Answer correct to 3 decimal places)

7) If you take a random person from the population, what is the probability their IQ score is less than 117?(Answer correct to 3 decimal places)

8) If you take a random person from the population, what is the probability their IQ score is greater than 100?(Answer correct to 2 decimal places)

9)If you take a random person from the population, what is the probability their IQ score is greater than 95?(Answer correct to 3 decimal places)

10

If you take a random person from the population, what is the probability their IQ score is less than 117?(Answer correct to 3 decimal places)

11

If you take a random person from the population, what is the probability their IQ score is greater than 100?(Answer correct to 2 decimal places)

12

If you take a random person from the population, what is the probability their IQ score is greater than 95?(Answer correct to 3 decimal places)

13

If you take a random person from the population, what is the probability their IQ score is greater than 130?(Answer correct to 3 decimal places)

14

If you take a random person from the population, what is the probability their IQ score will be between 85 and 115?(Answer correct to 3 decimal places)

15

If you take a random person from the population, what is the probability their IQ score will be between 70 and 130?(Answer correct to 3 decimal places

16

If you take a random person from the population, what is the probability their IQ score will be between 63 and 105?(Answer correct to 3 decimal places

17

If you take a random person from the population and find that they scored in the 87th percentile for IQ, what is their actual IQ score?(Answer correct to a whole number

18

If you take a random person from the population and find that they scored in the 21st percentile for IQ, what is their actual IQ score?(Answer correct to a whole number)