Confidence interval estimating their mean weight

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The world's smallest mammal is the bumblebee bat, also known as the Kitti's hog-nosed bat. Such bats are roughly the size of a large bumblebee. Listed below are weights in grams from a sample of these bats. Construct a 95% confidence interval estimate of their mean weight. Are the confidence interval limits very different from the limits of 1.56 and 1.87 that are found when assuming that o is known to be 0.30 g?

1.7 ,   1.6 ,   1.5 ,   2.0  ,  2.3 ,   1.6  ,  1.6  ,   1.8 ,  1.5  ,  1.7  ,  2.2  ,  1.4  ,  1.6  ,  1.6 ,  1.6 

Reference no: EM1318779

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