What’s the difference between a horizontal rotation and a rotation about the horizontal axis?

In an experiment you are to flip a two sided coin 100 times and record 55 heads up and 45 tails up determine the theoretical and experimental probability of getting a heads up in the experiment.

Write the system of equations represented by the matrix. 0 1 2 4 -2 3 6 9 1 0 1 3

Paint color preference children adults total 0.6 0.77 liked new paint color disliked new paint color 0.4 0.15 0.23 total 1.0 1.0 1.0 which value for x completes the conditional relative frequency table by column?