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comment Variance on the sum of predicted values from a mixed effect model on a timeseries
@user52220 That's where you're wrong. E(Xi) is the expected value and hence a random variable, whereas mu_i is the mean of the population and hence a fixed number. Var(mu) = 0, but the same is not correct for E(Xi).
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comment Change confidence risk of chisq
Feel free to edit. I did my best, but don't know how to call "random variation" like my grandmother understands it when talking to other statisticians. Randomness is part of the model, as in the random error. But randomness is also part of the experimental setup, as random selection from the population. Hence, a non-random effect in a model can be caused by random variation nonetheless.
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revised Change confidence risk of chisq
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comment Change confidence risk of chisq
@whuber Tried to use wording that's understood by people with a limited knowledge of statistics. Feel free to clarify, I would honestly not know how to clarify it. Continuous struggle with the students here as well...
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reviewed Approve Change confidence risk of chisq
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answered Change confidence risk of chisq