If you need more steps, just ask!
The first quartile is from the first dot to first vertical line, which is 13-15.5.
The maximum is the right most dot, which is 35.
The median is the line in the box, which is 10.5.
<span> The boundaries for the critical region determine how much distance between the sample mean and population mean is needed to reject the null. </span>
Total possible outcomes: (2)³=8 (heads or tails possibility on each toss)
Draw out a Tree diagram to illustrate the given example, labelling the probability on each branch.
Adding all the possible situations with P(t)≥2, we get 0.352 as the probability.
Hope I helped :)