Suppose the mean annual income for adult women in one city is $28,520 with standard deviation of $5190 and the distribution is extremely left-skewed. What is the distribution of the sample mean x for samples of size 49?

1. Approximately normal distribution

2. Exact normal distribution

3. Standard normal distribution

4. Can't specify, because sample is not large enough

Based on what i know about mean, this doesn't add up.

Which of the following would be a correct step in proving that triangle abc is congruent to triangle cda? a. use a protractor to measure the angles and show that all the corresponding angles are equal in measure. this will allow you to prove congruence by aaa. b. show that segment ab is parallel to segment cd and segment ad is parallel to segment cb. this will allow you to prove congruency by asa. c. show that is segment ab is perpendicular to segment ad. this will allow you to prove congruence by sas. d. none of the above.

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle