Answer Happy

Trace metals in drinking water affect the flavor and an unusually high concentration can pose a health hazard. Ten pairs of data were taken measuring zinc concentration in bottom water and surface water of a water source. Zinc Zinc Location concentration in concentration in bottom water surface water 1 .430 .415 2 .266 .238 3 .567 .390 .531 .410 5 .707 .605 6 .716 .609 4 0 7 .651 .632 8 .589 .523 9 .469 .411 10 .723 .612 Do the data support that the zinc concentration is less on the surface than the bottom of the water source, at the a = 0.1 level of significance? Note: A normal probability plot of difference in zinc concentration between the bottom and surface of water indicates the population could be normal and a boxplot indicated no outliers. a. Express the null and alternative hypotheses in symbolic form for this claim. Assume Hd = M1 – M2, where Hi is the population mean zinc concentration in the bottom of water and M2 is the mean zinc concentration in the surface of water. HO: H. Select an answer H:Ma Select an answer b. What is the significance level? c. What is the test statistic? Round to 3 decimal places. ? d. What is the p-value? Round to 4 decimal places. p= e. Make a decision. Reject the null Do not reject the null