Answered: Some governments have set a safety…

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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Some governments have set a safety limit for cadmium in dry vegetables at

0.5

part per million (ppm). Researchers measured the cadmium levels in a random sample of a certain type of edible mushroom. The accompanying table shows the data obtained by the researchers. Find and interpret a

95%

confidence interval for the mean cadmium level of all mushrooms of this type. Assume a population standard deviation of cadmium levels in mushrooms of this type of

0.34

ppm. (Note: The sum of the data is

6.31

ppm.)

Click here to view the data.

O Mushroom Cadmium Levels
0.27
0.64
0.64
0.13
0.77
1.12
0.94
0.25
0.36
0.25
0.62
0.32
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Some governments have set a safety limit for cadmium in dry vegetables at 0.5 part per million (ppm). Researchers
measured the cadmium levels in a random sample of a certain type of edible mushroom. The accompanying table
shows the data obtained by the researchers. Find and interpret a 95% confidence interval for the mean cadmium level
of all mushrooms of this type. Assume a population standard deviation of cadmium levels in mushrooms of this type of
0.34 ppm. (Note: The sum of the data is 6.31 ppm.)
Click here to view the data.
Click here to view page 1 of the table of areas under the standard normal curve.
Click here to view page 2 of the table of areas under the standard normal curve.
The 95% confidence interval is from
ppm to
ppm.
(Round to three decimal places as needed.)

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