Assume that blood pressure readings are normally distributed

Assume that blood pressure readings are normally distributed with a mean of 117 and a standard deviation of 5. A researcher wants to select people for a study but wants to exclude the people to top and bottom 10 percent. What are the upper and lower readings that would qualify people to participate in the study? Which of the following is not a characteristic of a binomial experiment? There are a fixed number of trials. Each trial depends on the previous outcome. There are only two possible outcomes, a success or a failure The probability of success is the same for each trial.

Solution

24) Mean = 117

sigma = 5

For 90%

z = 1.28

Margin of error = 6.40

Hence the upper and lower are 117+6.40 and 117-6.4

= 123, 111

OPtion c

25)

Option b is wrong.

In a binomial Each trial depends on the previous outcome is wrong.