1-After a million measurements of thing x, we find a sample mean of 50.39 and standard...
1-After a million measurements of thing x, we find a sample mean of 50.39 and standard deviation of 1. What chance, in percent (0-100) does the next measurement have of being 2 standard deviations from the mean? Do not include the percent sign?
2- After a million measurements of thing x, we find a sample mean of 60.1 and standard deviation of 3.22. What chance, in percent (0-100) does the next measurement have of being 3 standard deviations from the mean? Do not include the percent sign?
3- After a million measurements of thing x, we find a sample mean of 30.25 and standard deviation of 1.16. What chance, in percent (0-100) does the next measurement have of being 1 standard deviation from the mean? Do not include the percent sign?
Homework Answers
Add Answer to:
1-After a million
measurements of thing x, we find a sample mean of 50.39 and
standard...
After a million measurements of thing x, we find a sample mean of 30.49 and standard...
After a million measurements of thing x, we find a sample mean of 30.49 and standard deviation of 1.95. What chance, in percent (0-100) does the next measurement have of being 1 standard deviation from the mean? Do not include the percent sign.
6. Next, practice finding the deviations and the sample standard deviation of a set of measurements....
6. Next, practice finding the deviations and the sample standard deviation of a set of measurements. Imagine that you have measured the following times for a cart rolling down a track. Complete the table by finding the mean of your measurements, the deviation of each measurement, the square of the deviation, and finally the standard deviation. Make sure you are doing the SAMPLE standard deviation and dividing by N 1 instead of just by N! We will usually just say...
A sample of 10,000 electrical measurements has a mean of 380 kilovolts and standard deviation =...
A sample of 10,000 electrical measurements has a mean of 380 kilovolts and standard deviation = 5 kilovolts. The measurement does not follow any particular distribution. (a). use Tchebysheff's theorem to find the range of measurements [low, high] so that probability will be at least 80% (b). Use Tchebysheff's theorem to find the measurement value that will be greater than at most 5% of the time
A random sample of 49 measurements from one population had a sample mean of 18, with...
A random sample of 49 measurements from one population had a sample mean of 18, with sample standard deviation 5. An independent random sample of 64 measurements from a second population had a sample mean of 21, with sample standard deviation 6. Test the claim that the population means are different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The standard normal. We assume that both population distributions are approximately normal with unknown...
A random sample of 49 measurements from a population with population standard deviation o 3 had...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
The mean and standard deviation of a random sample of 100 measurements are equal to 10...
The mean and standard deviation of a random sample of 100 measurements are equal to 10 and 2, respectively. a. Find a 90% confidence interval for μ b. Test whether μ differs from 11 given α= 0:05 c. What is the p-value for the test.
The mean and standard deviation of a random sample of n measurements are respectively equal 3....
The mean and standard deviation of a random sample of n measurements are respectively equal 3. to 33.9 and 3.3 a) Find a 99% confidence interval for μ if n-100 b) Find a 99% confidence interval for μ if n-400 c) Find the widths of the confidence intervals you calculated in parts a and b. What is the effect on the width of a confidence interval of quadrupling the sample size while holding the confidence level constant?
1. pH measurements of a chemical solutions have mean 7.5 with standard deviation 0.06. Assuming all...
1. pH measurements of a chemical solutions have mean 7.5 with standard deviation 0.06. Assuming all pH measurements of this solution have a nearly symmetric/bell-curve distribution. Find the percent (%) of pH measurements reading below 7.5 OR above 7.62. 2. Salaries for senior Civil engineers per year have known mean of 70 K dollars and standard deviation 3 K dollars. Provided that the salaries per year for senior Civil engineers have a nearly symmetric/bell-curve distribution, what percent (%) of Civil...
Suppose X is normally distributed with mean 4 and standard deviation 4. Find the probability that...
Suppose X is normally distributed with mean 4 and standard deviation 4. Find the probability that 2X exceeds 7. Group of answer choices .5497 Suppose a random sample of 25 measurements is taken from a population with mean 17 and variance 100. The variance of the sample mean is Group of answer choices 2 0.68 4 17 100 .301 .4012 .4555 .5988
Suppose that we will randomly select a sample of 72 measurements from a population having a...
Suppose that we will randomly select a sample of 72 measurements from a population having a mean equal to 18 and a standard deviation equal to 9. (a) Describe the shape of the sampling distribution of the sample mean. Do we need to make any assumptions about the shape of the population? Why or why not? (b) Find the mean and the standard deviation of the sampling distribution of the sample mean. (Round your σx⎯⎯ answer to 1 decimal place.)...
6. Next, practice finding the deviations and the sample standard deviation of a set of measurements. Imagine that you have measured the following times for a cart rolling down a track. Complete the table by finding the mean of your measurements, the deviation of each measurement, the square of the deviation, and finally the standard deviation. Make sure you are doing the SAMPLE standard deviation and dividing by N 1 instead of just by N! We will usually just say...
A random sample of 49 measurements from one population had a sample mean of 18, with sample standard deviation 5. An independent random sample of 64 measurements from a second population had a sample mean of 21, with sample standard deviation 6. Test the claim that the population means are different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The standard normal. We assume that both population distributions are approximately normal with unknown...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
The mean and standard deviation of a random sample of n measurements are respectively equal 3. to 33.9 and 3.3 a) Find a 99% confidence interval for μ if n-100 b) Find a 99% confidence interval for μ if n-400 c) Find the widths of the confidence intervals you calculated in parts a and b. What is the effect on the width of a confidence interval of quadrupling the sample size while holding the confidence level constant?
Most questions answered within 3 hours.
-
Following maintenance and calibration, an extrusion machine
produces aluminum tubing with a mean outside diameter of...
asked 15 minutes ago -
In ionic equations,should every polyatomic ions be considered as
such or can this be further broken...
asked 19 minutes ago -
A first-time investor has found the following percentages of
stocks that are available: 30% are low...
asked 32 minutes ago -
Clean Corporation manufactures liquid window cleaner. The
following information concerns its work in process:
•
Beginning...
asked 29 minutes ago -
The following data were obtained in order to determine the
density of a cylindrical metal bar....
asked 33 minutes ago -
1. When ONE molecule of glucose is totally oxidized to
CO2 and H2O, how many net...
asked 36 minutes ago -
The probability that person A will pass Finite Mathematics is 7
8 and the probability that...
asked 51 minutes ago -
A mortgage of $200,000 is amortized over 25 years using level
payments at the end of...
asked 59 minutes ago -
Physics: Need help with inclined planes.
- Say an object is moving down an inclined plane...
asked 57 minutes ago -
Describe the process of nitrogen excretion in the body. List 4
steps and explain each step
asked 1 hour ago -
Determine the inductance of a solenoid with 670 turns in a
length of 29 cm ....
asked 1 hour ago -
Summarize the ways through which sales and operations
planning can be integrated. Then, extend your findings...
asked 1 hour ago