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 concentration in bottom Location concentration in surface water water 1 .430 .415 .266 .238 3 .567 .390 4 .531 .410

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
icon
Related questions
Topic Video
Question
11/15/2020
MyOpenMath
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
concentration
Location
concentration
in bottom
in surface water
water
1
.430
.415
2
.266
.238
.567
.390
4
.531
.410
.707
.605
6.
.716
.609
7
.651
.632
8
.589
.523
.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
Hj = µ1 - l2, where u1 is the population mean zinc concentration in the bottom of water and
lz is the mean zinc concentration in the surface of water.
Ho:ui Select an answer
Ha: Hã Select an answer
b. What is the significance level?
c. What is the test statistic? Round to 3 decimal places.
? V
d. What is the p -value? Round to 4 decimal places.
p =
e. Make a decision.
Reject the null
Do not reject the null
https://www.myopenmath.com/assess2/?cid%3D80488&aid%3D5754732#/print
6/7
Transcribed Image Text:11/15/2020 MyOpenMath 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 concentration Location concentration in bottom in surface water water 1 .430 .415 2 .266 .238 .567 .390 4 .531 .410 .707 .605 6. .716 .609 7 .651 .632 8 .589 .523 .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 Hj = µ1 - l2, where u1 is the population mean zinc concentration in the bottom of water and lz is the mean zinc concentration in the surface of water. Ho:ui Select an answer Ha: Hã Select an answer b. What is the significance level? c. What is the test statistic? Round to 3 decimal places. ? V d. What is the p -value? Round to 4 decimal places. p = e. Make a decision. Reject the null Do not reject the null https://www.myopenmath.com/assess2/?cid%3D80488&aid%3D5754732#/print 6/7
11/15/2020
MyOpenMath
f. What is the conclusion?
There is not sufficient evidence to support the claim that the zinc concentration is less on
the surface than the bottom of the water source.
There is sufficient evidence to support the claim that the zinc concentration is less on the
surface than the bottom of the water source.
https://www.myopenmath.com/assess2/?cid=80488&aid=5754732#/print
7/7
Transcribed Image Text:11/15/2020 MyOpenMath f. What is the conclusion? There is not sufficient evidence to support the claim that the zinc concentration is less on the surface than the bottom of the water source. There is sufficient evidence to support the claim that the zinc concentration is less on the surface than the bottom of the water source. https://www.myopenmath.com/assess2/?cid=80488&aid=5754732#/print 7/7
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Knowledge Booster
Hypothesis Tests and Confidence Intervals for Means
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman