Answered: A scientist estimates that the mean…

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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Question

A scientist estimates that the mean nitrogen dioxide level in a city is greater than 34 parts per billion. To test this estimate, you determine the nitrogen dioxide levels for 31 randomly selected days. The results (in parts per billion) are listed to the right. Assume that the population standard deviation is 8. At α=0.03, can you support the scientist's estimate? Complete parts (a) through (e).

14
24
43
32
28
43
40
32
18
36
30
17
17
19
36
43
39
26
20
19
44
23
44
39
30
28
41
33
15
42
22

At α=0.03, can you support the scientist's estimate? Complete parts (a) through (e).

(b) Find the critical value and identify the rejection region.

z0=

(Round to two decimal places as needed.)

Rejection region:

(d) Decide whether to reject or fail to reject the null hypothesis.

At the 3% significance level, there is __________ evidence to

________ the scientist's claim that the mean nitrogen dioxide level in the city is greater than 34 parts per billion.

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