Question: Question 8 E An instructor for a statistics course collected data on the weight (in grammes) of humming birds. Her sample comprises 225 birds drawn

Question 8 E An instructor for a statistics course collected data on the weight (in grammes) of humming birds. Her sample comprises 225 birds drawn at random from areas all across the country, The students in the statistics course were divided into three groups and assigned to construct a 95% condence interval estimate for the average weight A (in gl of a humming bird using all the information in the data set. The condence intervals obtained were: GroupA: 2.944 3 /,L S 3.092 Group B: 2.914 :11 i 3.057 Group C: 2.935 g p E 3.065 it turned out that all the three intervals were theoretically valid. That is, they all had 95% coverage probability. (a) Which of the three intervals, if any, would you prefer to use? Answer: The interval from Group C. V (b) Can you say something about the sample standard deviation 5? Answe \\/ [Select] 5 > 0.97 There is insufficienl information to say anything aboul s. 0.80

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