The u. s. bureau of labor statistics reports that 11.3% of u. s. workers belong to unions. suppose a sample of 400 u. s. workers is collected in 2014 to determine whether union efforts to organize have increased union membership at 0.025 level of significance. the sample results in a test statistic (z) of 1.31. we conclude that union membership increased in 2014. (enter 1 if the conclusion is correct. enter 0 otherwise.)

1 is the answer

Step-by-step explanation:

Given that the U.S. Bureau of Labor Statistics reports that 11.3% of U.S. workers belong to unions.

(Right tailed test for testing of a sample proportion with population proportion)

Suppose a sample of 400 U.S. workers is collected in 2014 to determine whether union efforts to organize have increased union membership at 0.025 level of significance.

Test statistic Z = 1.31

p value for this right tailed test would be 0.095

This p value is greater than 0.025

Hence at 2.5%  significance level the conclusion is correct

1 is the answer.

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees