convenience samples survey each participant once, and voluntary samples survey each participant numerous times.
convenience sampling is a method of random sampling, and a voluntary sample is not.
convenience sampling is not a probability-based method, and voluntary sampling is.
Answer: A convenience sample is structured based on accessibility to the researcher, and a voluntary sample is based on participant interest.
Step-by-step explanation:
For the conventional sample the researcher chooses a sample that is readily available in some non-random way. Thus, it is structured based on accessibility to the researcher.
But for the voluntary sample the researcher puts out a request for participants of a population to join the sample, and participants decide whether or not to be in the sample. Thus, it is based on participant interest.
4
-4
-18
18
Answer: B. -4
Step-by-step explanation:
2 m
4 m
5 m
15 m
x = mums sold by Alex
y = mums sold by Jackson
A general cosine function has the form:
f(x) = A*cos(c + x)
We want to find the value of A that matches the one in the image, and we will find that A = 3
Ok, a general cosine function is:
f(x) = A*cos(c + x)
Where A is the amplitude.
To find the amplitude of a cosine function, we just need to find half of the difference between the maximum and minimum value of the function:
By looking at the given graph, we can see that the maximum is y = 3, and the minimum is y = -3
Then the amplitude is:
A = (3 - (-3))/2 = 6/2 = 3
The correct option is B.
If you want to learn more, you can read:
Answer: It’s 4 they’re all wrong (pretty sure I have the same graph)
Step-by-step explanation: