dagdata | Data for the HarvardX courses : PH525x | Data Visualization library
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Data for the HarvardX courses: PH525x
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QUESTION
I'm having trouble on an assignment involving t-tests, in which i'm asked to calculate a p-value 10000 times from a sample n=5 of a population and describe the proportion of times in which it is below 0.05. Here's the source file
...ANSWER
Answered 2020-May-20 at 15:40The issue is you need to use pt()
rather than pnorm()
, with appropriate degrees of freedom.
QUESTION
I'm sorry for asking this here but there is no discussion page for this course on the website and it mentions stackoverflow to ask any questions. This is from this edx course.
Q1: Using the following dataset:
...ANSWER
Answered 2020-Apr-19 at 19:19The random number generator in R changed significantly at R version 3.6.0, as highlighted in an R Bloggers article, What's new in R 3.6.0?
If you're using a pre 3.6.0 version of R, you'll get the following t-test statistic based on your code:
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