Refer to the Newsela article "The Lakota Tribe Wants to Educate People Through Music Project."
1 answer:
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Answer:
[0, 57.5]
<em>OR</em>
0 - 57.5
Step-by-step explanation:
Given the function which gives the heart rate as per time.
That means Heart rate of the runner changes according to time.
is a function which takes Time as input as observed by the function's representation. In bracket, there is
.
That also means time is the input to the function
.
It is also given that during the time as the runner runs, the heart beat will change.
The output of the given function will be Heart beat of the runner.
Time taken to complete the run is given as 57 minutes and 30 seconds.
Domain of a function is the valid inputs that can be given to the function for which the output of the function is defined.
Here, time in minutes is the input to the function.
So, maximum time can be 57.5 minutes.
And as the runner will start from the time = 0 minutes
So, the valid inputs can be from <em>0 to 57.5 minutes.</em>
Therefore, the domain is [0, 57.5]
<em>OR</em>
0 - 57.5
Answer:
test statistic (Z) is 2.5767 and p-value of the test is .009975
Step-by-step explanation:
: percentage of students who smoke did not change
: percentage of students who smoke has changed
z-statistic for the sample proportion can be calculated as follows:
z= where
- p(s) is the sample proportion of smoking students (
=0.25)
- p is the proportion of smoking students in the survey conducted five years ago (18% or 0.18)
- N is the sample size (200)
Then, z= ≈ 2.5767
What is being surveyed is if the percentage of students who smoke has changed over the last five years, therefore we need to seek two tailed p-value, which is .009975.
This p value is significant at 99% confidence level. Since .009975 <α/2=0.005, there is significant evidence that the percentage of students who smoke has changed over the last five years