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IQ is distributed as with most things over a bell curve. A rough distribution is that for each 98th percentile IQ increases by 30 points (SB). This puts the top 2% of people around 130 IQ, 160 would be the top 2% of those top 2%, or 0.004% of the population.
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IQ scores are normally distributed with a mean of 100 and a standard deviation of 15 If a certain statistician has an IQ of 140 what percent of the population has an IQ less than she does?
99.6% for
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15 if a certain statistician has an IQ of 140 what percent of the population has an IQ less than he does?
About 98% of the population.
What are some examples of abnormal and normal distribution in statistics?
IQ is normally distributed in the general population. Age is not.
What are some examples of normally distributed data in the real world?
The heights or masses of adult males, or of adult females. IQ scores (whatever they measure).
What the average IQ for 9 year old boys?
All IQ tests are standardized; there are three tests that can be taken, depending on the age of the candidate.The IQ of everyone in a given generation is always set to be normally distributed with mean 100 and variance 15. (Looks like a bell curve.)Therefore, the "average" IQ for anyone is 100.
Is a normally distributed variable needed to have a normally distributed sampling distribution.?
Yes, it is.
Can you think of a variable that is normally distributed?
The value of a roll of two dice is normally distributed.
Scores on an examination are assumed to be normally?
...normally distributed.
Is weight normally distributed?
NO!
Does a population have to be normally distributed in order to use the chi-square distribution?
No, but the approximation is better for normally distributed variables.
What is the The sum of two normally distributed random variables?
The sum of two random variables that are normally distributed will be also be normally distributed. Use the link and check out the article. It'll save a cut and paste.
Give example of variable that is normally distributed?
Some examples of anormal distribution are: heights of men and women, weights of men and women, IQ's, body temperature, and many manufacturing processes to name a few.
