A blood pressure test was given to 450 women ages 20 to 36. It showed that their mean systolic blood pressure was 119.2 mm Hg, with a standard deviation of 12.1 mm Hg. (a) Determine the z-score, to the nearest hundredth, for a woman who had a systolic blood pressure reading of 112.2 mm Hg. ______ (b) The z-score for one woman was 2.11. What was her systolic blood pressure reading? (Round your answer to one decimal place.)  _____mm Hg

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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.