Purchase Solution

Using Probability to Estimate IQ

Not what you're looking for?

Ask Custom Question

The IQ of children in a certain population is normally distributed with mean 100 and standard deviation 10. If a child is randomly chosen from this group, the probability that the child's IQ is less than 85 or greater than 110 is?
a. .0919
b. .2255
c. .9081
d. .7745

Purchase this Solution
Solution Summary

This solution gives a step-by-step process of how to determine the probability of selecting a child with an IQ greater than 110 or less than 85.

Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

View More Free Quizzes
Related BrainMass Solutions

  • Correlation and Correlation Coeifficent

    However, using the regression model, the bias is not evident (Table 4, column 3), which has a near zero estimate (r = .03). Two other implications are that education and social class seem to be good predictors of IQ.

  • Statistical Analysis of a Given Data

    b) Estimate the relationship between IQ and test scores using regression analysis c) Interpret the meaning, both in the abstract and specifically related to this problem, of the Y intercept and beta coefficient.

  • Probability Distributions - Scores

    If a person is selected at random, what is the probability that his IQ score will fall below 105 and will it be between 90 and 110. 2. An advertising company plans to market a product for low income families.

  • The Normal Distribution and Confidence Intervals

    Using the 0.95 degree of confidence, what is the interval estimate for the population proportion (to the nearest tenth of a percent)?

  • Basic Statistics Test 1

    Albert Einstein reportedly had an IQ of 160. Convert Einsteins's IQ score to a z score. Suppose Forrest Gump had an IQ score of 65. Convert Forrest Gump's IQ score to a z score.

  • Probability calculations using Normal Distribution

    235272 Statistics: Probability Calculations using Normal Distribution The IQ for adults is 100 and the standard deviation is 16. a. What percentage of people have an IQ greater than 140? b. What percentage have IQ's between 100 and 140? c.

  • Normal Distribution

    Probability corresponding to x > 130 is 0.13% 0r 0.0013 Prob(z)=1-Prob(x > 130)= 0.9987 =1-0.0013 or 99.87% z corresponding to a probability corresponding to 99.87% is 3.01147 Mean= M = ?

  • Probability, confidence interval, sample size

    If a person is selected at random, what is the probability that his IQ score will fall below 105 and will it be between 90 and 110. 2. An advertising company plans to market a product for low income families.

  • Understanding and calculating probabilities

    Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 90% confidence, that the sample mean is with 5 IQ points of the true mean (E=5). Assume that 7.

View More Related Solutions