Question

To delcrminc the organic matcrial in a dried lake hed, the percent carbon by mass is mcasurod at two dilferent locations. Toc locations, it must lirst be detcrminod whcther the standard deviations of thc two locations arc dilferent compare thc mcans of the two dilferent (% C) 20.40 20.20 20.30 20.40 20.20 (% C) 20.10 20.90 20.30 20.80 20.40 For cach kocation, calculaic thc standard deviation and report it with two signilicant ligures. location I standard deviation: 0.10 location 2 standard deviation: 0.34 What is the calculaied valuc for the standard deviations? Are thc standard deviations for the two locations significantly diflccnt at the 95% confidcncc lcvel? What is the calculaicd valuc usod to compare the mcans of thesc two locations? a1.265 Are the mcans for the two difarcnt locations significantly diflcrcn1 at thc 95% confidencc lcvcl?

Answer 1