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) What is the 95% confidence interval for the difference between proportions (to 4 decimal places)?   (b)  Based on your result in (f), would you reject or fail to reject the null hypothesis?  Why do you conclude this?

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