FORESTRY
AGRICULTURAL STATISTICS AND ECONOMICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
What is the margin of error for the interval (6.8, 12.9)?
|
|
9.85
|
|
|
3.05
|
|
|
3.50
|
|
|
6.8
|
Explanation:
Detailed explanation-1: -The margin of error is the radius (half) of the 99 % confidence interval, or 2.58 standard errors, when p = 50 %. As such, it can be calculated directly from the number of poll respondents. To conclude, the margin of error is the 99 % confidence interval for a reported percentage of 50 %.
Detailed explanation-2: -Since 95% of values fall within two standard deviations of the mean according to the 68-95-99.7 Rule, simply add and subtract two standard deviations from the mean in order to obtain the 95% confidence interval.
There is 1 question to complete.