Blood Pressure Statistics and Analysis

The video tutorial covers the analysis of blood pressure data from a sample of females. It explains the empirical rule (68-95-99.7) and its application to the data, using a mean of 125 mmHg and a standard deviation of 10 mmHg. The tutorial demonstrates how to calculate the percentage of females with blood pressure between 105 and 135 mmHg, resulting in 81.5%. It also calculates the number of females with blood pressure higher than 145 mmHg, finding that 10 out of 400 participants fall into this category.

What was the mean blood pressure of the sample of females?

• 115 millimeters of mercury

• 125 millimeters of mercury

• 135 millimeters of mercury

• 145 millimeters of mercury

What is the standard deviation of the blood pressure measurements?

• 20 millimeters of mercury

• 5 millimeters of mercury

• 10 millimeters of mercury

• 15 millimeters of mercury

According to the empirical rule, what percentage of data falls within one standard deviation of the mean?

• 95%

• 99.7%

• 50%

• 68%

What percentage of data falls within two standard deviations of the mean according to the empirical rule?

• 50%

• 68%

• 95%

• 99.7%

What is the blood pressure value at one standard deviation above the mean?

• 115 millimeters of mercury

• 125 millimeters of mercury

• 135 millimeters of mercury

• 145 millimeters of mercury

What is the blood pressure value at two standard deviations below the mean?

• 95 millimeters of mercury

• 105 millimeters of mercury

• 115 millimeters of mercury

• 125 millimeters of mercury

What is the blood pressure value at three standard deviations above the mean?

• 175 millimeters of mercury

• 145 millimeters of mercury

• 155 millimeters of mercury

• 165 millimeters of mercury

What percentage of females had blood pressure between 105 and 135 millimeters of mercury?

• 99.7%

• 95%

• 81.5%

• 68%

How many females had blood pressure higher than 145 millimeters of mercury?

• 5

• 20

• 10

• 15

What percentage of females had blood pressure higher than 145 millimeters of mercury?

• 1.5%

• 4.5%

• 3.5%

• 2.5%