I’m working on a engineering exercise and need an explanation and answer to help me learn.
CAT 2 Engineering, Statistics Questions
1 (long Q and A)
(a) Explain the difference between the population standard deviation and
the sample standard deviation. State the formula for each of them and provide an
example illustrating how each can be correctly used. [10]
(b) An experimental reading is taken 50 times. It is believed that the experiment is producing unbiased results that do not vary as a function of time. The sum
of the readings is 5.0 units and the sum of the squares of the readings is 1.0 units2
.
Estimate the range in which you are 95% confident that the true experimental results
lies.
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