When asked whether they would agree to be vaccinated against COVID at no cost, 703 of 1000 sampled adults in Brazil said “yes,” and 2497 of 3045 sampled people in India said “yes.” Find a 99% confidence interval for the true difference in the desire between these two countries to receive a COVID vaccination at no cost. Round final values to three decimal places. Bonus: Expain in words what this interval tells us.

Q: Find the value of t a/2 for a 99% confidence interval when the sample size is 30

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.