Q. How do you find the mode when given the mean?
mode = 3*median – 2*mean = 12 – 6 = 6, instead of 5, which is just off by 1. For case (2): mean = 3, median = 2, mode = 0. Pearson’s formula give: mode = 3*median – 2*mean =6 – 6 = 0, which is correct based on the data.
Q. What is the median of 23?
Since there are an even number of values, the median will be the average of the two middle numbers, in this case 23 and 23, the mean of which is 23.
Q. Is range affected by extreme values?
The range is the difference between the high and low values. Since it uses only the extreme values, it is greatly affected by extreme values. The variance is the average squared deviation from the mean.
Q. Which of the measure of central tendency is not affected by extreme values?
median
Q. Is standard deviation affected by extreme values?
Although standard deviation is less susceptible to extreme values than the range, standard deviation is still more sensitive than the semi-quartile range. If the possibility of high values (outliers) presents itself, then the standard deviation should be supplemented by the semi-quartile range.
Q. Why is the mean sensitive to extreme scores?
The mean is sensitive to extreme scores when population samples are small. Means are better used with larger sample sizes. The median is the middle score in a list of scores; it is the point at which half the scores are above and half the scores are below.
Q. What is the most stable and useful measure of central tendency?
Mean
Q. What is the standard deviation of the scores?
Z-score indicates how much a given value differs from the standard deviation. The Z-score, or standard score, is the number of standard deviations a given data point lies above or below mean. Standard deviation is essentially a reflection of the amount of variability within a given data set.
Q. What does a standard deviation of 1 mean?
A normal distribution with a mean of 0 and a standard deviation of 1 is called a standard normal distribution. For example, a Z of -2.5 represents a value 2.5 standard deviations below the mean.
Q. How do you calculate 2 standard deviations from the mean?
The Formula Explained
- Work out the mean.
- Then for each number: subtract the Mean and square the result.
- Then work out the mean of those squared differences.
- Take the square root of that:
- Work out the mean.
- Then for each number: subtract the Mean and square the result.
- Then work out the mean of those squared differences.
Q. What percent is 2 standard deviations above the mean?
95%
Q. What is two standard deviations above IQ?
The two-standard-deviations rule implies that about 5 percent of the population have IQ scores more than 30 points away from 100: 2.5 percent above 130 and 2.5 percent below 70.
Q. What is Bill Gates IQ?
160 IQ
Q. What is the IQ of a gifted child?
Depending on which test is used, the gifted IQ range is as follows: Mildly gifted: 115 to 129. Moderately gifted: 130 to 144. Highly gifted: 145 to 159.
Q. What is the highest IQ in the world 2020?
With a score of 198, Evangelos Katsioulis, MD, MSc, MA, PhD, has the highest tested IQ in the world, according to the World Genius Directory.
Q. Who is the smartest person alive 2020?
Christopher Michael Langan (born March 25, 1952) is an American horse rancher and autodidact who has been reported to score very highly on IQ tests. Langan’s IQ was estimated on ABC’s 20/20 to be between 195 and 210, and in 1999 he was described by some journalists as “the smartest man in America” or “in the world”.
Q. What is Albert Einstein IQ?
According to estimates by means of biographical data, Albert Einstein’s IQ has been estimated to sit anywhere between 160 and 180.
Q. What was Steve Jobs IQ?
Both Steve Jobs and Bill Gates had the same IQ of 160, equal to Albert Einstein.
