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If a person with an IQ greater than 3 standard deviations above the mean is considered genius what percent of the population is considered geniuses?
I am not sure if this is correct, but here's my reasoning based on statistics: avg IQ is 100, and under a normalized bell curve that would include 95% of the population, so to move 3 std dev above or below would be:
1 std dev includes: 100-95 = 5. 5/2 = 2.5 so 2.5 + 95 => 97.5%
2 std dev includes: 100 - 97.5 = 2.5. 2.5/2 = 1.25 so 97.5 + 1.25 = 98.75
3 std dev includes: 100 - 98.75 = 1.25. 1.25/2 = .625 so 98.75 + .625 = 99.375
100 - 99.375 is percentage of population who are geniuses (more than 3 std dev above the mean) - about 0.6%, which is more than 1 in 200 people - That seems like a lot but unfortunately I'm not one of them :)
What else can I help you with?
How many standard deviations is 16.50 from the mean?
How many standard deviations is 16.50 from the mean?
I have two data sets with the same number of values with means x1 and x2 and standard deviations of n1 and n2. How do you average means with standard deviations?
You can't average means with standard deviations. What are you trying to do with the two sets of data?
How many standard deviations is 19 from the mean?
That depends on what the standard deviation is.
For a population of beetles with a mean mandible length of 5 mm and a standard deviation of 1 mm How many standard deviations away from the mean is a beetle with mandible length of 54 mm?
49
When a data set is normally distributed about how much of the data fall within two standard deviations of the mean?
In a normally distributed data set, approximately 95% of the data falls within two standard deviations of the mean. This is part of the empirical rule, which states that about 68% of the data falls within one standard deviation and about 99.7% falls within three standard deviations. Therefore, two standard deviations capture a significant majority of the data points.
What does normality mean in health and social care?
All minor deviations occurring with two standard deviations under the Gaussian curve are considered normal. Deviations occurring outside of two standard deviations are considered abnormal.
If IQ scores are normally distributed with a mean of 100 and a standard deviation of 17 and if the population of the world is 6575000000 how many geniuses are there in the world today?
I'm assuming "genius" means an unusual value (more than two standard deviations) in the right tail. This is (100 - 95.45)/2 = 2.275 percent, approximately. So: 6,575,000,000 * 0.02275 = 149,581,250 geniuses ... not that special, huh?
How many standard deviations is 16.50 from the mean?
How many standard deviations is 16.50 from the mean?
How many standard deviations above and below the mean contains 99 percent of the population?
2.576 sd
What is the sum of the deviations from the mean?
The sum of standard deviations from the mean is the error.
In a standard normal distribution 95 percent of the data is within plus standard deviations of the mean?
95% is within 2 standard deviations of the mean.
What is the standard deviation for Wechsler intelligence for children?
The mean for the WISC, like the WAIS, is 100. The deviations from 100, or standard deviations, are 15.
What is 2 standard deviations?
2 times the standard deviation!
I have two data sets with the same number of values with means x1 and x2 and standard deviations of n1 and n2. How do you average means with standard deviations?
You can't average means with standard deviations. What are you trying to do with the two sets of data?
How many standard deviations is 19 from the mean?
That depends on what the standard deviation is.
What does STD devs stand for?
standard deviations
What percent of a normal population is within 2 standard deviations of the mean?
In a normal distribution, approximately 95% of the population falls within 2 standard deviations of the mean. This is known as the 95% rule or the empirical rule. The empirical rule states that within one standard deviation of the mean, about 68% of the population falls, and within two standard deviations, about 95% of the population falls.
