The distribution of results from a cholesterol test has a mean
of 180 and a standard deviation of 20. A sample size of 40 is drawn
randomly.
Find the sum that is 1.1 standard deviations below the mean of the
sums. (Round your answer to two decimal places.)
here expected mean of 40 drawn sample =40*180=7200
and standard deviation =20*sqrt(40)=126.4911
therefore sum that is 1.1 standard deviations below the mean of the sums =7200-1.1*126.4911=7060.86
The distribution of results from a cholesterol test has a mean of 180 and a standard...
1.The distribution of results from a cholesterol test has a mean of 180 and a standard deviation of 20. A sample size of 40 is drawn randomly. Find the probability that the sum of the 40 values is greater than 7,400. (Round your answer to four decimal places.) 2.A researcher measures the amount of sugar in several cans of the same soda. The mean is 39.01 with a standard deviation of 0.5. The researcher randomly selects a sample of 100. Find the sum...
An unknown distribution has a mean of 80 and a standard deviation of 12. A sample size of 95 is drawn randomly from the population. Find the sum that is 1.5 standard deviations below the mean of the sums.
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