Question

The mean of diastolic blood pressure (DBP) level for Americans to be 72.0 mmHg. The estimated...

The mean of diastolic blood pressure (DBP) level for Americans to be 72.0 mmHg. The estimated standard deviation was approximately 10.3 mmHg. Using these estimates as mean and standard deviation for the American population, consider the sampling distribution of sample means based on a sample size of 40 drawn.

a) What would the proportion of sample mean levels of DBP 55.0 mmHg or lower?

b) What would the proportion of sample mean levels of DBP 85.0 mmHg or higher?

c) What would the proportion of sample mean levels of DBP between 55.0 and 85.00 mmHg?

d) Can a sample of any size be used to estimate the proportion of sample means? Instead of a sample of 40, we had a sample of 400. The proportion estimated from which sample mean will be closer to the population mean? Why?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Systolic blood pressure (SBP) in healthy US adults is normally distributed with mean 116 mmHg [2]...
Systolic blood pressure (SBP) in healthy US adults is normally distributed with mean 116 mmHg [2] and standard deviation 10 mmHg. Suppose that you select repeated samples of size 15 from this population and calculate the mean for each sample. a) if you were to select a large number of random samples, each size 15, what would be the mean of the samples mean? b) what would be the standard deviation of these sample means? what is another name for...
Research Scenario Hypertension is defined as a systolic blood pressure (SBP) of 140 mmHg or more,...
Research Scenario Hypertension is defined as a systolic blood pressure (SBP) of 140 mmHg or more, or a diastolic blood pressure (DBP) of 90 mmHg or more. Diastolic blood pressure (DBP) measurements from the general population form a normal distribution with m = 82 mmHg and s = 10 mmHg. Epidemiological studies have shown that obesity increases the risk of hypertension (high DBP). Using data from a cohort study, a researcher obtained a sample of n = 144 obese persons...
Example 1: Among females in the US in a given age cohort, a diastolic blood pressure...
Example 1: Among females in the US in a given age cohort, a diastolic blood pressure is normally distributed with mean µ = 95 mm Hg and standard deviation σ = 15 mm Hg. a) What is the probability that a randomly selected woman has a diastolic blood pressure less than 90 mm Hg? b) What is the probability that she has a diastolic blood pressure greater than 95 mm Hg? c) What is the probability that she has a...
According to the American Time Use Survey, adult Americans spend a mean time of 2.35 hours...
According to the American Time Use Survey, adult Americans spend a mean time of 2.35 hours a day watching television on a weekday. Assume that the standard deviation for the time spent watching television on a weekday is 1.93 hours. a. If a sample of 40 adult Americans is obtained, describe the sampling distribution of the mean x-bar. In other words, describe the shape of the distribution, the mean of the sampling distribution, and the standard deviation of the sampling...
According to the WHO MONICA Project the mean blood pressure for people in China is 128...
According to the WHO MONICA Project the mean blood pressure for people in China is 128 mmHg with a standard deviation of 23 mmHg (Kuulasmaa, Hense & Tolonen, 1998). Blood pressure is normally distributed. State the random variable. Blood pressure for people in China Suppose a sample of size 15 is taken. State the shape of the distribution of the sample mean. Suppose a sample of size 15 is taken. State the mean of the sample mean. Suppose a sample...
Question Central Limit Theorem a)According to the Central Limit Theorem, what are the mean and standard...
Question Central Limit Theorem a)According to the Central Limit Theorem, what are the mean and standard deviation of the sampling distribution of sample means? b)A population has a mean ?=1800 and a standard deviation ?=40. Find the mean and standard deviation of the sampling distribution of sample means when the sample size n=100.
A population has a mean μ=40 and a standard deviation σ=4. What is the standard deviation...
A population has a mean μ=40 and a standard deviation σ=4. What is the standard deviation of the sampling distribution of the sample means if the sample size is n=16?
The mean size of candy bars from one candy maker is 39.0 grams with a standard...
The mean size of candy bars from one candy maker is 39.0 grams with a standard deviation of 2.3 grams. If you produce a sampling distribution of sample means using samples of size 40 from the candy production line, what would be the mean of the sampling distribution? What is the standard deviation of the sampling distributions of the sample means?
The heights of 1000 students are approximately normally distributed with a mean of 174.5 centimeters and...
The heights of 1000 students are approximately normally distributed with a mean of 174.5 centimeters and a standard deviation of 6.9 centimeters. Suppose 200 random samples of size 25 are drawn from this population and the means recorded to the nearest tenth of a centimeter. Determine (a) the mean and standard deviation of the sampling distribution of X¯; (b) the number of sample means that fall between 171 and 177 cm.
A random sample of size 30 is selected from a known population with a mean of...
A random sample of size 30 is selected from a known population with a mean of 13.2 and a standard deviation of 2.1. Samples of the same size are repeatedly collected, allowing a sampling distribution of sample means to be drawn. a. What is the expected shape of the resulting distribution? b. Where is the sampling distribution of sample means centered? c. What is the approximate standard deviation of the sample means? 2. The lifetimes of a certain type of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT