If you wanted to test this null hypothesis at the 95% confidence level, what would be your critical z? (b) What is the standard error of the difference between proportions
If you wanted to test this null hypothesis at the 95% confidence level, what would be your critical z? (b) What is the standard error of the difference between proportions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Question
Suppose it was found that in a random sample of 200 individuals who were underweight (defined as having a BMI of under 18.5), 8 of them were hospitalized with COVID-19. Of a corresponding group of 400 individuals who were classified as severely obese (defined as having a BMI of at least 45.0), 32 were hospitalized with COVID-19.
(a) If you wanted to test this null hypothesis at the 95% confidence level, what would be your critical z?
(b) What is the standard error of the difference between proportions (to 4 decimal places)?
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