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Pratyusha
Questions (2)
Rain fall is measured by which instrument
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Kara walks 9 blocks to school.Each block is 65 feet long.How many yards does Kara walk to and from school?
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Answers (1)
use test for proportions : Formula : ( p1 - p2 ) / sqrt ( Pcap * Q cap ( 1/n1 + 1/n2 ) where P cap = (n1p1 + n2p2 )/ (n1 + n2 ) Q cap = 1 - P cap
