According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg. Blood pressure is normally distributed. Suppose a sample of size 25 is taken.

It is possible with rounding for a probability to be 0.0000.

d) Find the mean of the sampling distribution of the sample mean.

Put the numeric value in the first box and the correct units in the second box.

e) Find the standard deviation of the sampling distribution of the sample mean.

Put the numeric value rounded to two decimal places in the first box and the correct units in the second box.

f) What is the shape of the sampling distribution of the sample mean?

Select an answer

normal or approximately normal

uniform

left-skewed

right-skewed

unknown

Why? Check all that apply:

• n is at least 30
• n is less than 30
• population is normal
• is known
• population is not normal
• is unknown

g) Find the probability that the sample mean blood pressure of the 25 randomly selected people in China is less than 121.8 mmHg.Round final answer to 4 decimal places.

DO NOT use the rounded standard deviation from part e in this computation.

Use the EXACT value of the standard deviation with the square root.

h) Find the probability that the sample mean blood pressure of the 25 randomly selected people in China ismore than138.62 mmHg.

Round final answer to 4 decimal places.

DO NOT use the rounded standard deviation from part e in this computation.

Use the EXACT value of the standard deviation with the square root.

i) Is a mean blood pressure of 138.62 mmHgunusually highfor 25 randomly selected people in China?

Select an answer

Yes, the probability of having a sample mean blood pressure of at least 138.62 mmHg is less than or equal to 0.05

Yes, the probability of having a sample mean blood pressure of at least 138.62 mmHg is more than 0.05

Yes, the probability of having a sample mean blood pressure of at most 138.62 mmHg is less than or equal to 0.05

Yes, the probability of having a sample mean blood pressure of at most 138.62 mmHg is more than 0.05

No, the probability of having a sample mean blood pressure of at least 138.62 mmHg is less than or equal to 0.05

No, the probability of having a sample mean blood pressure of at least 138.62 mmHg is more than 0.05

No, the probability of having a sample mean blood pressure of at most 138.62 mmHg is less than or equal to 0.05

No, the probability of having a sample mean blood pressure of at most 138.62 mmHg is more than 0.05

j) If you found a mean blood pressure for a sample of 25 people in Chinaas high as138.62 mmHg, what might you conclude?

Select an answer

There is evidence that the mean blood pressure of all people in China may now be lower than 128 mmHg

There is evidence that the mean blood pressure of all people in China may now be higher than 128 mmHg

There is no evidence that the mean blood pressure of all people in China has changed from 128 mmHg