Need help also fiinding:(B) has the proportion of adults who totaly abstain from alcohol changed?what is the zo=what is the p value=reject null hypothesis In 1943, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you on occasion consume, alcoholic beverages?" Of the 1100 adults surveyed, 440 indicated that they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 374 indicated that they were total abstainers. Complete parts (a) and (b) below.(a) Determine the sample proportion for each sample.The proportions of the adults who took the 1943 survey and the recent survey who were total abstainers are [ ] and [ ], respectively.(Round to three decimal places as needed.)

Given : x1= 440.0 n1= 1100 x2= 374.0 n2= 1100 significance level, 0.05solution : sample proportion p̂1 = x1 / n1 = 440.0 / 1100 = 0.4 p̂2 = x2 / n2 = 374.0 / 1100 = 0.34 The proportions of the adults who took the 1943 survey and the recent survey who were total abstainers are 0.4 and 0.34 respectively.b) Pooled Proportion =( 440.0 + 374.0 )/ 1100 + 1100 = 0.37 Hypothesis test : The null and alternative hypothesis is Ho : p1 = p2 Ha : p1 ≠ p2 The hypothesis test is a two tailed test Test statistic test statistic for two proportion z test is = ( 0.4 - 0.34 )/(v( 0.37 (1- 0.37 ))/(1/ 1100 )+/(1/ 1100 )) = 2.91 Test statistic , zo is 2.91 P-value : p-value with test statistic z= 2.91 is P-value =2P(Z>|Zobs|) = 2 x P(z >| 2.91 |) = 0.0036 ....... (from standard normal distribution table) ∴ P-value is 0.0036 Decision : since P-value is less than significance level,α = 0.05 ,we reject the null hypothesis Decision is reject the null hypothesis

Answered: has the proportion of adults who totaly…

Math

Statistics

has the proportion of adults who totaly abstain from alcohol changed? what is the zo= what is the p value= reject null hypothesis

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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