Determine the folloing probabilities
Let X be N (μ=25,σ^2=16). Determine the folloing probabilities:
a) P(X>23);
b) P(IX-5I
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A researcher claims that the average age of people who buy theatre tickets is 43. A sample of 30 is selected and their ages are recorded as shown below. The standard deviation is 6. At a = 0.01 is there enough evidence to reject the researcher's c
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