I dont even know where to start with this math! pls help
2 answers:
Answer:
Option A
Step-by-step explanation:
Given is a scatter plot graph with so many points marked on it and the least possible regression line is drawn with least distance from the points.
We are to find the equation of the line of best fit.
On the x axis is marked minutes played and y axis points scored.
To find the equation of the regression line we must have atleast two points lying on it.
We find that two points lying on it are (30,21) and (8,6)
Slope of the line = change in y / change in x
=
Using point slope formula we find that
Option A is right answer
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Answer:
The required sample size for the new study is 801.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error is:
25% of all adults had used the Internet for such a purpose
This means that
95% confidence level
So , z is the value of Z that has a pvalue of
, so
.
What is the required sample size for the new study?
This is n for which M = 0.03. So
Rounding up:
The required sample size for the new study is 801.