In 1945, 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, 352 indicated that they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 275 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 1945 survey and the recent survey who were total abstainers are .320 and .250 , respectively. (Round to three decimal places as needed.) (b) Has the proportion of adults who totally abstain from alcohol changed? Use the a = 0.01 level of significance. First verify the model requirements. Select all that apply. O A. The samples are independent. O B. The sample size is less than 5% of the population size for each sample. O C. The sample size is more than 5% of the population size for each sample. O D. The data come from a population that is normally distributed. O E. nyêi (1-â1) 2 10 and ngP2 (1-ê2) 2 10 OF. The samples are dependent.

In 1945, 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, 352 indicated that they were total abstainers. In a recent survey, the same question was asked of 1100 adults and 275 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 1945 survey and the recent survey who were total abstainers are .320 and .250 , respectively. (Round to three decimal places as needed.) (b) Has the proportion of adults who totally abstain from alcohol changed? Use the a = 0.01 level of significance. First verify the model requirements. Select all that apply. O A. The samples are independent. O B. The sample size is less than 5% of the population size for each sample. O C. The sample size is more than 5% of the population size for each sample. O D. The data come from a population that is normally distributed. O E. nyêi (1-â1) 2 10 and ngP2 (1-ê2) 2 10 OF. The samples are dependent.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 8E

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