Khan Academy
Step-by-step guide to calculating standard deviation for population data.
Khan Academy
If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Help us do more - Khan Academy
The information does not usually directly identify you, but it can give you a more personalized web experience. Because we respect your right to privacy, you can choose not to allow some types of cookies. Click on the different category headings to find out more and change our default settings.
خان اکیڈیمی - Khan Academy
If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Sample standard deviation and bias - Khan Academy
The short answer is "no"--there is no unbiased estimator of the population standard deviation (even though the sample variance is unbiased). However, for certain distributions there are correction factors that, when multiplied by the sample …
Khan Academy
Khan Academy
Course Updates for High School Statistics in July 2021
2021年7月30日 · The idea of spread and standard deviation. Calculating standard deviation step by step. Two-way frequency tables. Two-way relative frequency tables and associations. Positive and negative associations in scatterplots. Samples and surveys. Observational studies and experiments. Probability: the basics
Khan Academy
Learn how to calculate percentiles and analyze cumulative relative frequency graphs in this AP®︎/College Statistics lesson.
Standard deviation quiz before material covered
The quiz Comparing Data Distributions in unit 2 of Statistics and Probability asks questions about standard deviation and interquartile range, but from what I can tell, those topics hadn't yet come up in the course videos.
Khan Academy
Math: Get ready courses; Get ready for 3rd grade; Get ready for 4th grade; Get ready for 5th grade; Get ready for 6th grade; Get ready for 7th grade; Get ready for 8th grade