Mathematics, 19.02.2021 01:00 shadowangel84

A random sample of 1000 medical files is used to estimate the proportion p of all people who have blood type B. After the study 426 of the files indicated people with blood type B. Using a normal approximation, find the 95% confidence interval. If we know from previous study that 38.8% of the people in the population are type B, check whether this is true or not for this study

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