A university department chair believes that the afternoon section of a large survey class has a consistently lower proportion of students that pass the class compared to the morning section. The chair checks a random sample of student records from each section. The results of the data collected are shown below. Morning section Afternoon section Successes 346 Successes 426 500 Observations 400 Observations p-hat_1 0.865 p-hat 2 0.852 Confidence level 95% z-score -0.5548 p-value 0.2912 -3 2 3 P = Ex: 1.234 Z= Morning section samples: n₁ = Ex: 9 Afternoon section samples: n₂ = Sample proportion for morning section samples: p₁ = Ex: 1.234 Sample proportion for afternoon section samples: P₂ =
A university department chair believes that the afternoon section of a large survey class has a consistently lower proportion of students that pass the class compared to the morning section. The chair checks a random sample of student records from each section. The results of the data collected are shown below. Morning section Afternoon section Successes 346 Successes 426 500 Observations 400 Observations p-hat_1 0.865 p-hat 2 0.852 Confidence level 95% z-score -0.5548 p-value 0.2912 -3 2 3 P = Ex: 1.234 Z= Morning section samples: n₁ = Ex: 9 Afternoon section samples: n₂ = Sample proportion for morning section samples: p₁ = Ex: 1.234 Sample proportion for afternoon section samples: P₂ =
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 2E
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