A public health official in Indian River county needs to estimate the average diastolic blood pressure of all residents in Indian River county for a report that is being prepared for the Florida...

A public health official in Indian River county needs to estimate the average diastolic blood pressure of all residents in Indian River county for a report that is being prepared for the Florida Department of Health.
The official randomly selected 137 Indian River county residents and found that the mean diastolic blood pressure of the sample was 79 millimeters of mercury (mm Hg).
Using a 95% confidence level, determine the margin of error, EE, and a confidence interval for the mean diastolic blood pressure of all Indian River county residents. From past research, it is known that the standard deviation of the distribution of all Indian River county residents' diastolic blood pressure is 7 mm Hg.


Report the confidence interval using interval notation. Round solutions to two decimal places, if necessary.
The margin of error is given by E=.
A 95% confidence interval is given by