Question

In: Statistics and Probability

IQ scores (as measured by the Stanford-Binet intelligence test) are normally distributed with a mean of...

IQ scores (as measured by the Stanford-Binet intelligence test) are normally distributed with a mean of 95 and a standard deviation of 14. Find the approximate number of people in the United States (assuming a total population of 280,000,000) with an IQ higher than 126. (Round your answer to the nearest hundred thousand.) How many People?

Also please explain thoroughly and where the 0.5 and the other decimal number come from. Thanks in advance!

Solutions

Expert Solution

Solution:

Value from z-table:

In-case of any other doubt, please comment.

orchestra answered 2 years ago
Next > < Previous

Related Solutions

IQ scores (as measured by the Stanford-Binet intelligence test) are normally distributed with a mean of...
IQ scores (as measured by the Stanford-Binet intelligence test) are normally distributed with a mean of 100 and a standard deviation of 16. What percentage of the population has an IQ score between 110 and 124? (Round your answer to the nearest percentage point.)
Scores on the Stanford-Binet Intelligence Test (IQ) are normally distributed with mean µ = 100 and...
Scores on the Stanford-Binet Intelligence Test (IQ) are normally distributed with mean µ = 100 and standard deviation σ = 16. If a random sample of 49 individuals are selected, calculate the probability that the sample mean IQ is less than 96. (round your answer to the nearest four decimal places)
Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard...
Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard deviation of 18. (b) Write the equation that gives the z score corresponding to a Stanford–Binet IQ test score. z = (x – 100 ) / 18 (c) Find the probability that a randomly selected person has an IQ test score. (Round your answers to 4 decimal places.) 1. P(x > 135) 2. P(x < 89) 3. P(71 < x < 129) − =...
Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard...
Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard deviation of 18. (b) Write the equation that gives the z score corresponding to a Stanford–Binet IQ test score. z = (x – 100 ) / 18 (c) Find the probability that a randomly selected person has an IQ test score. (Round your answers to 4 decimal places.) 1. P(x > 135) 2. P(x < 89) 3. P(71 < x < 129) − =...
Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard...
Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard deviation of 11. (b) Write the equation that gives the z score corresponding to a Stanford–Binet IQ test score. z = (x – 100 ) / 11 (c) Find the probability that a randomly selected person has an IQ test score. (Round your answers to 4 decimal places.) 1. P(x > 134) .001 2. P(x < 80) .0345 3. P(84 < x < 116)...
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a...
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability that a person would score 130 or more on the test? A..0200 B..0500 C..0228 D..0250 What is the probability that a person would score between 85 and 115? A..6826 B..6800 C..3413 D..6587 Suppose that you enrolled in a class of 36 students, what is the probability that the class’ average IQ exceeds 130? A. almost zero...
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a...
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability that a person score would be grater than 140?
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a...
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15 What is the probability that a person would score between 85 and 115?
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a...
The Intelligence Quotient (IQ) test scores are normally distributed with a mean of 100 and a standard deviation of 15.  Given a class with 12 students, what is the probability that the class' average IQ score is less than 115?
The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of...
The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 25. What is the probability we could select a sample of 25 adults and find the mean of the sample is more than 110?
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT