1) If I'm taking a poll and I ask every person, 'How many days did you exercise last month?'. The answer to this is a discrete variable, correct? Just want to make sure.

2) The actual question - See the distribution below. I performed a non parametric test (Krusal Wallis) where the count of instances for 3 groups are plotted. The number of days, as mentioned above, are along the x-axis. The test resulted in a p-value of 0.8. Which is surprising to me because the distributions look almost identical. And maybe this is right and I can reject the null that the distributions aren't equal, but I want to make sure. I guess I'm also interested in how the P-Value is actually calculated here. Thanks!