You’re trying to determine the percentage of airline flights that leave on time. If you need a `E`% margin of error and you want to be 95% confident, what minimum sample size would you need? You can show your work in the file you attach for partial credit.
Read DetailsSamples of rain taken on 12 days had an average pH of `x` with a standard deviation of `s`. Calculate the margin of error for a 95% confidence interval of the mean pH level of rain in this area. Enter your result below to three decimal places.
Read DetailsSurveys of patients in a local clinic showed that 16% had infections prior to being seen. If the survey included 21 patients, calculate a 95% confidence interval of the proportion of patients who have infections. Show your work and results in the file that you upload.
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