Hypothesis Testing 03: Example 1

As many in the description noted, I could have used a TWO-TAILED distribution and not a one-tailed one. So tricky!! But sometimes you don't have a two-tailed distribution z-table and you need to make do with the one-tailed one. That's why we divided 5% by two and got 2.5% on either end. That puts 95% in the center.