6. Suppose it is needed to estimate the number of turtles in a lake. One day a sample of 300 turtles are captured, marked, and released back into the lake. The following day a sample of 150 turtles are captured, of which 69 of them are marked (and so recaptured). (a) Estimate the number of turtles in the lake. [Show some work.] (5) (b) Give a 95 percent interval estimate for that in Part (a). [Show some work.] (5)
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