Answer:
b
Hopefully that helped
Step-by-step explanation:
9514 1404 393
Answer:
- (x +1)² = 4
- (D) x = -1 ±2
Step-by-step explanation:
Start by getting the x-terms on one side of the equal sign. We can do that by subtracting x from both sides.
3 = x² +2x
Now, add the square of half the x-coefficient.
3 +1 = x² +2x +1
(x +1)² = 4 . . . . . . . . write as a square in the desired form
__
To solve, take the square root, and add the opposite of the left-side constant.
x +1 = ±2
x = -1 ±2 . . . . . . matches choice (D)
Answer:
Increasing sample size (n), decreasing the standard deviation or decreasing the confidence level will reduce the margin of error.
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for population mean <em>μ</em> is:
The margin of error for this interval is:
So, the factors affecting the margin of error are:
- Confidence level
- Standard deviation
- Sample size
It is provided that the team was not happy with the result of the 95% confidence interval constructed, because they felt the margin of error was much too large.
To reduce the margin of error:
- Increase the sample size.
Since the sample is inversely proportional to the margin of error, increasing the value of <em>n</em> will decrease the MOE.
- Decrease the standard deviation.
The standard deviation is directly proportional to the margin of error. On decreasing the standard deviation value the MOE of the interval will also decrease.
- Decrease the confidence level.
The critical value of the distribution is based on the confidence level. Higher the confidence level, higher will be critical value.
So, on deceasing the confidence level the critical value will decrease, hence decreasing the margin of error.
Answer:
a=2,b=3,c=8 is the answers for the question
Step-by-step explanation:
please give me brainlest to
Answer:
*View attached graph*
Step-by-step explanation:
Graph those points on your coordinate plane
Hope this helps!