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 Location concentration in bottom water 1 2 3 4 5 6 7 8 9 10 .430 .266 .567 .531 .707 .716 .651 Ho: Pa .589 =0 .469 .723 Zinc concentration in surface water .415 .238 .390 .410 .605 .609 .632 .523 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. Ha:a>0 b. What is the significance level? α = 0.1 .411 a. Express the null and alternative hypotheses in symbolic form for this claim. Assume μã = μ₁ − µ₂, is the population mean zinc concentration in the bottom of water and 2 is the mean zinc concentration in the surface of water. where .612 c. What is the test statistic? Round to 3 decimal places. O=0.838 X d. What is the p-value? Round to 4 decimal places. P = 0.2119 X
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 Location concentration in bottom water 1 2 3 4 5 6 7 8 9 10 .430 .266 .567 .531 .707 .716 .651 Ho: Pa .589 =0 .469 .723 Zinc concentration in surface water .415 .238 .390 .410 .605 .609 .632 .523 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. Ha:a>0 b. What is the significance level? α = 0.1 .411 a. Express the null and alternative hypotheses in symbolic form for this claim. Assume μã = μ₁ − µ₂, is the population mean zinc concentration in the bottom of water and 2 is the mean zinc concentration in the surface of water. where .612 c. What is the test statistic? Round to 3 decimal places. O=0.838 X d. What is the p-value? Round to 4 decimal places. P = 0.2119 X
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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