Express the confidence interval using the indicated format.
Express the confidence interval -0.129 < p < 0.631 in the form of p ± E.
To express the confidence interval -0.129 < p < 0.631 in the form of p ± E, we need to calculate the central value of the interval (p) and the margin of error (E).
The central value, p, can be calculated by taking the average of the two bounds of the confidence interval:
p = (0.631 + (-0.129)) / 2
= 0.251 / 2
= 0.126
The margin of error, E, can be calculated by taking half of the difference between the bounds of the confidence interval:
E = (0.631 - (-0.129)) / 2
= 0.760 / 2
= 0.380
Therefore, the confidence interval -0.129 < p < 0.631 can be expressed as:
p ± E
0.126 ± 0.380