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how do u find the sample mean. They will be normally distributed with variance sigma2 n. -81 -81.
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They will be normally distributed with variance sigma2 n. The product of the sample size nand the probability pof the event in question occurring must be greater than or equal to 10 and similarly the product of the sample size and one minusthe probability of the event in occurring must also greater than or equal to 10. First you will need to count how many sample items you have within a data set and add up.
It is nothing but the arithmetic average of the sample values.
In mathematical language this means that np 10. Subtract 3 from each of the values 1 2 2 4 6 1-3 -2 2-3 -1 2-3 -1 4-3 1 6-3 3 Your list of differences is -2 -1 -1 1 3. All of these things I just mentioned these all just mean the standard deviation of the sampling distribution of the sample mean. For example if the mean of our sample is 20 we can say the true mean of the population is 20 plus-or-minus 2 with 95 confidence.
