The ph measurements of water specimens from various locations along a given river basin are normally distributed with standard deviation 0.3. the average ph of water specimens from 4 randomly selected locations on this river basin is 7.8

a) based on these data, a 95% confidence interval for mean has a margin of error of?

b) if instead of 4 water specimens we had measured the ph of 16 water specimen, the a margin error of a 95% confidence interval for mean would be?

answer: 26

step-by-step explanation:

well, michelle wanted to measure the height of her school's flagpole she placed a mirror on the ground 48 feet from the flagpole then walk backwards until she was able to see the top of the pole in the mirror her eyes were 5 feet above the ground and she was 12 ft from the mirror using similar triangles find the height of the flagpole to the nearest tenth of a foot find the geometric mean of them pair of numbers. its easy math

the answer is: the length is 5/6 yards.

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step-by-step explanation: