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Karina plays a video game that is scored by round. In about 500 rounds, her career average is 20 points per
round with a standard deviation of 5 points per round. Suppose we take random samples of 3 past rounds and
calculate the mean number of points that she scored in each sample.
Calculate the mean and standard deviation of the sampling distribution of T.
You may round to one decimal place.


Sagot :

Answer:

20

2.9

Step-by-step explanation: khan