Which equation represents the line show
2 answers:
The slope-intercept form:
m - slope
b - y-intercept → (0, b)
We have the point (0, 2). Therefore we have y-intercept 2 → b = 2.
The equation of the line is: w = mz + 2.
We have next point (1, 5). Substitute the coordinates of the point to the equation of the line:
<em>subtract 2 from both sides</em>
You might be interested in
Answer:
The 80% confidence interval for the population mean is between 28.32 characters and 31.68 characters.
Step-by-step explanation:
We have the standard deviation for the population, so we can use the normal distribution. If we had the standard deviation for the sample, we would have to use the t-distribution.
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 30 - 1.68 = 28.32 characters.
The upper end of the interval is the sample mean added to M. So it is 30 + 1.68 = 31.68 characters.
The 80% confidence interval for the population mean is between 28.32 characters and 31.68 characters.