r=3 can help? please^^

Answer this question using the following information: P(0

Answer this question using the following information: < z < 2.17) 0.4850 < Z < 1.96) 0.4750, where Z is the standard normal random variable. (a) (b) (c) A researcher wishes to estimate the average number of days patients take to recover fully from COVID. A random sample of 25 x (R + 2)2 COVID patients had a mean of 40.2 days and a standard deviation of 8.8 days. Find the 97% confidence interval of the population mean. Correct your answers to 2 decimal places. (4 marks) A survey of I adults who had been vaccinated to prevent COVID-19 found that (20 + R)% of them had suffered from severe allergic reaction. Find the 95% confidence interval of the true proportion of vaccinated adults who would suffer severe allergic reaction. Correct your answers to 2 decimal places. (4 marks) A researcher wishes to estimate, with 95% confidence, the true proportion of people who do not want to be protected by vaccination against COVID-19. A previous study shows that ofthose interviewed did not want to be vaccinated. The researcher wishes to be accurate within (2 % of the true proportion. Find the nummum e size necessary. (2 marks)