Answer:
And the 95% confidence interval would be between (69.027;80.793)
Step-by-step explanation:
Information given
represent the sample mean
population mean (variable of interest)
represent the population standard deviation
n=33 represent the sample size
Confidence interval
The confidence interval for the mean is given by the following formula:
(1)
The degrees of freedom are given by:
The Confidence level is 0.99 or 99%, the significance would be and , the critical value for this case would be
And replacing we got:
And the 95% confidence interval would be between (69.027;80.793)
Answer:
3. Walter's sample is not representative. 4. The population is his community service group.
Step-by-step explanation:
3. His sample is not representative because the survey was only on his math class, not the whole entire population. This sample only represents his math class.
4. The population is his community service group that is what class he is surveying 15 members from.
Hope this helped!
Answer:
Option C, x = 35
Step-by-step explanation:
<u>If two angels are supplementary, they add up to 180</u>
<u />
<u>Step 1: Make an equation</u>
<em>3x + 15 + 60 = 180</em>
<em />
<u>Step 2: Solve for x</u>
3x + 15 + 60 = 180
3x + 75 - 75 = 180 - 75
3x / 3 = 105 / 3
<em>x = 35</em>
<em />
Answer: Option C, x = 35
The answer is C.
The y-intercept is 1, the slope is -1/3, and the shaded area is under the graph because y is LESS than -x/3 + 1.