Question
Test a claim that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.32 parts per million. It was
Test a claim that the mean amount of carbon monoxide in the air in U.S. cities is less than 2.32 parts per million. It was found that the mean amount of carbon monoxide in the air for the random sample of 65 cities is 2.38 parts per million and the standard deviation is 2.12 parts per million. At =0.05, can the claim besupported? Complete parts(a) through(e) below. Assume the population is normally distributed.
(a) Identify the claim and state H0 and Ha. Which of the following correctly states H0 and Ha?
H0:
mu
less than
<
nothing
Ha:
mu
greater than or equals
2.32
2.32
(Type integers or decimals. Do notround.)
The claim is the alternative
hypothesis.
(b) Use technology to find the criticalvalue(s) and identify the rejectionregion(s).
The criticalvalue(s) is/are t0=
0.20
0.20.
(Use a comma to separate answers as needed. Round to two decimal places asneeded.)
Choose the graph which shows the rejection region.
A.
0
-4
4
t
t0
t0
t0 A graph labeled negative t 0 less than t less than t 0 has a horizontal t-axis labeled from negative 4 to 4 in increments of 4. A symmetric bell shaped t-distribution curve is above the t-axis and centered on 0. Two vertical line segments extend from the curve to the t-axis at the points labeled negative t 0 and t 0, where t 0 is to the right of 0. The area under the curve between negative t 0 and t 0 is shaded. B. 0 -4 4 t t0 t0 t
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started