If the population mean is 28 with standard deviation of 2, what is the interval that falls within 68% of the data? The average salary of entry level nurse is P35 000 with standard deviation of P5 000....

If the population mean is 28 with standard deviation of 2, what is the interval that falls within 68% of the data?

The average salary of entry level nurse is P35 000 with standard deviation of P5 000. Find the probability that the salary of a selected nurse is between P32 000 and P37 500?

Which is NOT true for a normal distribution?

The length of human pregnancies from conception to birth approximates a normal distribution with a mean of 266 days and standard deviation of 16 days. what is the probability that the pregnancy will last between 255 to 270 days?