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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.
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.
Scores on an examination are assumed to be normally?
...normally distributed.
What does 111 IQ mean?
IQ is a "Normally Distributed random variable" meaning that it follows a bell curve. This curve is centred on 100, meaning that 100 is the average value for all people. The standard deviation is 15, meaning that 95% of the population is meant to be within 70-130 for their IQ. 111, therefore, is a slightly-above-average IQ test, however, IQ tests are subject to error, and depending on the questions, you could get a different score next time.
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.
