Measure of central tendency that splits the density curve into 2 regions of equal area
Find the standard deviation of the following set of data: 2, 9, 7, 13, 21, 5
1-Var Stats
The standard deviations of two independent random variables X & Y are 12 and 5 respectively. Find the standard deviation of X - Y.
Name for most common method used in linear regression
The standard deviations of two independent random variables X & Y are 3 and 4 respectively. Find the standard deviation of X + Y.
Measure of central tendency that is the balance point of the density curve
The mean of normally distributed set of data is 25 and the st dev is 3.5. Determine the percent of data between 23 & 34.
normalcdf
The mean of a normally distributed set of data is 100 with a st dev of 10. Find the percentage of the data above a value of 116.
normalcdf
Student A earned an 86% on a test (mean 80, st dev 6)/student B earned a 94% (mean 92, st dev 1.5)/student C earned a 91% (mean 89, st dev 0.9)/Who had best score relative to mean?
Question
Answer
TI-84 command
The following set of data was drawn from a larger population: 3, 15, 18, 27, 16, 14, 12 Find the standard deviation.
1-Var Stats
Find the z-score for an observed value of 71.5 if the mean is 70 and the standard deviation is 2.8.
Father of Modern Stats/quantitative geneticist who developed ANOVA & namesake F-test/worked on stats to analyze Mendelian genetics & Darwinian theory/worked at Rothamsted Research
Direction of skew if mean is less than median
Term given by difference: y observed - y predicted
Mathematician credited w/establishing stats as discipline/1st university stats dept at Univ College of London/into eugenics & social darwinism/chi-squared, correlation coefficient
Direction of skew if mean is greater than median
Inequality that says the percent of data within k standard deviations is greater than or equal to 100 times (1-1/k^2)
The scores on a test are normally distributed set of data has a mean of 55 and st dev of 3. Find the score that would correspond to the 80th percentile.
invNorm
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