My graphs are not showing up correctly

I'm not sure what I did wrong, but my graphs are not showing up correctly once I run the code. Please help me figure out what's the problem is.

This is my code and graphs
x = rnorm(1000,4,1);x

xbar = {}
for (i in 1:100)
x = sample(x,50);
xbar[i] = mean(x);

par(mfrow = c(2,2))

This is what the graphs are supposed to look like

There is nothing wrong with your graphs, they do exactly what they should do.
But you should have a look at xbar before plotting it. The problem lies within the method you are using to produce your data.

Thank you so much! I found out what I did wrong with the xbar

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