Study for researching blood pressure where the mean systolic blood pressure is 140 and the standard deviation is 15. Assume the population is normally distributed with 95% confidence. How large is the margin of error if the sample size is set to 50. What is the minimum value of n, if the study must have a margin of error of 1. Can you show your work on a distribution graph? Thank you very much!

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.