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psyppose age that cildren learn to walk is norm dusributed w mean of 13 months and...

psyppose age that cildren learn to walk is norm dusributed w mean of 13 months and sr.dev.1. month ..15 randomly selected people were asked what age they learned to walk ...


find that the sum of all afes for 15 rand.sel. will be greater than 195 months .state command .


for 15 people,find prob.that the average that they learn to walk is between 12 and 13.5 months ..

find IQR for average first rime

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