Of seven coastal lighthouses in the same area, three are designed by a certain well-known architect. A tour group randomly picks two different ones to visit, one on Monday and one on Tuesday. What is the chance that both lighthouses by the famous architect are chosen?

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A: Given that  Sample size n =100 Sample mean =16 Variance =16 SD=4

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Q: Q30. Sample mean-11.399 Standard Dev. =13.309 n=991 PE- 11.399 TS-85% CI Alpha= 0.15 Alpha/2=0.075…

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Q: 11

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A: Given that  Sample size n =250 Favorable cases =22 Sample proportion p^=x/n  =22/250 =0.088