MAT 122 Lecture Notes - Lecture 3: Pew Research Center, Summary Statistics, Standard Deviation
Document Summary
5: find the test statistic, critical values and critical region by making a bell curve. Fail to reject h0 if the test: write the nal claim. H1= p> 0. 75: = . 01, z= p-hat - p / [(p * q)/n, p-hat = (x/n) z= (856/1007) * 0. 75 / [(0. 75 * (1-0. 75)/ 1007] = (. 85004) * 0. 75 / [0. 75 * 0. 25) / 1007] z= 7. 33. Draw a bell curve and label the correct parts. *notice that h1 has a > symbol and this means it is a right-tail* 7. 33: because 7. 33 is in the critical (shaded) region, we reject h0, there is suf cient evidence to support the claim that 75% of adults know what twitter is. Identify the speci c claim or hypothesis to be tested, put it in symbolic form. 1: give the opposite of the claim you just wrote, tell which is h0 and h1 (h1 is the one not containing equality)
