Posted by **waqas** on Wednesday, August 17, 2011 at 2:20pm.

3.The lifespan of 300 Giant turtles is found to follow a Normal distribution ~ N(70,144).

(a)What is the standard error for this sample’s mean? (b) What is the probability of a turtle living more than 85 years?

(c)What is the probability of a turtle living between 60 and 65 years?

(d)Find the 98% confidence interval for the mean lifetime.

(e) Below what age do the shortest lived 15% of turtles die?

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