STATS 10 Lecture Notes - Lecture 20: Null Hypothesis
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Details on looking up z to get p-value. If ha has , the p-value is the area to the right of z. If ha has !=, the p-value is 2*tail area. H0: p = 0. 3, ha: p != 0. 3, alpha = 0. 05. We"ll pretend (cid:449)e ha(cid:448)e done our calculations. P-value = 0. 0332 < alpha: = reject h0. Proportions with 2 samples: hypotheses, h0: p1 = p2, can also be written h0: p1 p2 = 0, ha: p1 != p2 (or > or /< 0. In 2015, a survey was conducted: the survey asked 1040 random people about their opinion on uber, 210 people had a positive impression of uber. In 2017, another survey was conducted: 620 random people were asked, 230 people responded affirmatively.
