The stemplot shows IQ scores that are consistent with the 2018 article "Flynn effect and its reversal are both environmentally caused."88 2 42 488 6 7 7 8 9 9 96 7 7 8 9 9 999 0 0 0 1 2 2 2 40 0 0 1 2 2 2 499 5 5 5 5 5 6 6 7 7 8 8 8 8 8 8 9 9 95 5 5 5 5 6 6 7 7 8 8 8 8 8 8 9 9 91010 0 0 0 0 0 1 1 1 1 1 2 2 3 4 40 0 0 0 0 1 1 1 1 1 2 2 3 4 41010 5 5 5 5 5 6 6 6 7 7 8 8 8 9 95 5 5 5 5 6 6 6 7 7 8 8 8 9 91111 0 2 2 3 30 2 2 3 31111 5 5 6 6 85 5 6 6 81212 2 3 42 3 4This distribution is very close to Normal with a mean of 100 and a standard deviation of 10. Use the Normal distribution with a mean of 100 and standard deviation of 10 as a description of the IQ scores of all adults.Use this distribution and the 68‑95‑99.7 rule to answer the questions. What percentage ?p of all students have IQ scores below 80? Give your answer as a percentage to one decimal place.

Let X denote the IQ scores of adults. Given that X follows N(mean = 100, SD = 10)

Answered: What percentage ?p of all students have…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Question

The stemplot shows IQ scores that are consistent with the 2018 article "Flynn effect and its reversal are both environmentally caused."

88	2 42 4
88	6 7 7 8 9 9 96 7 7 8 9 9 9
99	0 0 0 1 2 2 2 40 0 0 1 2 2 2 4
99	5 5 5 5 5 6 6 7 7 8 8 8 8 8 8 9 9 95 5 5 5 5 6 6 7 7 8 8 8 8 8 8 9 9 9
1010	0 0 0 0 0 1 1 1 1 1 2 2 3 4 40 0 0 0 0 1 1 1 1 1 2 2 3 4 4
1010	5 5 5 5 5 6 6 6 7 7 8 8 8 9 95 5 5 5 5 6 6 6 7 7 8 8 8 9 9
1111	0 2 2 3 30 2 2 3 3
1111	5 5 6 6 85 5 6 6 8
1212	2 3 42 3 4

This distribution is very close to Normal with a mean of 100 and a standard deviation of 10. Use the Normal distribution with a mean of 100 and standard deviation of 10 as a description of the IQ scores of all adults.

Use this distribution and the 68‑95‑99.7 rule to answer the questions.

What percentage ?p of all students have IQ scores below 80? Give your answer as a percentage to one decimal place.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

Expert Solution