What is the approximate z-value with interpretation for the probability that the average Systolic blood pressure will be less than 122 mmHg? Round to the nearest hundredth.
A)z = -3.00 which is less than or equal to 3 standard deviations which is not a significant result.
B)z = -3.00 which is less than or equal to 3 standard deviations which is a significant result.
C)z = 3.00 which is greater than or equal to 3 standard deviations which is a significant result.
D)This probability cannot be determined because we do not know the distribution of the population.

Question

Quizplus · Accepted Answer

A z-value of -3.00 (or 3.00) indicates a point that is 3 standard deviations away from the mean. In a normal distribution, this is significant because it falls in the tail (less than 0.3% of the distribution lies beyond ±3 standard deviations from the mean), indicating a low probability event under the assumption of normality.

What Is the Approximate Z-Value with Interpretation for the Probability