Description Usage Arguments Details Value See Also Examples
View source: R/mean_vs_median_t_movie.R
A movie to compare the sampling distributions of the sample mean and sample median based on a random sample of size n from a (central) Student's t distribution.
1 2 | mean_vs_median_t_movie(n = 10, t_df = 2, delta_n = 1, pos = 1,
envir = as.environment(pos))
|
n |
An integer scalar. The size of the samples drawn from a Student's t distribution. |
t_df |
A positive scalar. The degrees of freedom of the Student's t
distribution (see |
delta_n |
A numeric scalar. The amount by which the value of the sample size is increased/decreased after one click of the +/- button. |
pos |
A numeric integer. Used in calls to |
envir |
An alternative way (to |
The movie is based on simulating repeatedly samples of size
n
from a central Student's t distribution with degrees of
freedom t_df
.
It contains three plots.
The top plot contains a histogram of the most recently
simulated dataset, with the probability density function (p.d.f.)
of the Student's t distribution with t_df
degrees of freedom
superimposed.
Each time a sample is simulated the sample mean and sample median are calculated. These values are indicated on the top plot as a filled circle: a red circle for the sample mean and a blue circle for the sample median; and are added to the values plotted in the middle and bottom plots.
The plot in the middle contains a histogram of the sample means of all the simulated samples.
The plot on the bottom contains a histogram of the sample medians of all the simulated samples.
An extra sample is produced by clicking the + button next to "number of samples of size n". [Ignore the - button.] The value of the sample size can be changed using the +/- buttons in the panel.
Nothing is returned, only the animation is produced.
movies
: general information about the movies.
mean_vs_median_normal_movie
: compares the
sampling distributions of the sample mean and sample median based
on a random sample of size n from a standard normal distribution.
1 2 3 4 5 6 7 8 9 | # Load package rpanel
# [Use install.packages("rpanel") if necessary]
library(rpanel)
# Produce movie using values from the Aussie births data
## Not run:
mean_vs_median_t_movie(t_df = 2)
## End(Not run)
|
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