Question3: Consider the following 11 independent measurements from a normal distribution: Independent measurements 12 21 20...
Question3: Consider the following 11 independent measurements from a normal distribution:
| Independent measurements | ||||||||||
| 12 | 21 | 20 | 11 | 13 | 9 | 15 | 16 | 17 | 20 | 18 |
1. What is the standard error of the sample mean?
2. Calculate a 99% confidence interval for the population mean.
Homework Answers
The statistical software output for this problem is :
One sample T confidence interval:
μ : Mean of variable
95.9% confidence interval results:
| Variable | Sample Mean | Std. Err. | DF | L. Limit | U. Limit |
|---|---|---|---|---|---|
| Data | 15.636364 | 1.2080994 | 10 | 12.803567 | 18.46916 |
Standard error = 1.2081
A 99% confidence interval for the population mean is : (12.8036 , 1804692)
Add Answer to:
Question3: Consider the following 11 independent
measurements from a normal distribution:
Independent measurements
12
21
20...
1) Calculate a 95% and 99% confidence interval for the following data set. Note: this is...
1) Calculate a 95% and 99% confidence interval for the following data set. Note: this is a sample. Show your steps including the mean, z-score, standard deviation, and standard error that you use. Use the data set listed below. 12 10 18 16 11 10 9 17 6 13 10 20 21 24 18 17 19 12 11 10
12 and 13 12. Using a normal distribution and z score formula answer the following questions:...
12 and 13
12. Using a normal distribution and z score formula answer the following questions: a. Find the Z-score that cuts off the top 35% of the nornval curve b. Find the data value to the nearest whole number that cuts off the bottom 20% of the curve given that the mean is 75 and sample standard deviation is 5. c. Find the z scores that cut off the middle 50% of the normal curve. 13. This question is...
For the following data: 1 2 3 4 5 6 16 20 18 17 18 21...
For the following data: 1 2 3 4 5 6 16 20 18 17 18 21 a. Calculate the sample mean and sample variance b. Calculate the probability that the population mean is between 9 and 10 if the population standard deviation is known to be 2.3. What is the 95% confidence interval for the population mean if the population standard deviation is known to be 2.3? d. Calculate the 95% confidence interval using the sample standard deviation. c.
12-13 show work 12. Using a normal distribution and z score formula answer the following questions:...
12-13 show work
12. Using a normal distribution and z score formula answer the following questions: a. Find the Z-score that cuts off the top 35% of the nornval curve b. Find the data value to the nearest whole number that cuts off the bottom 20% of the curve given that the mean is 75 and sample standard deviation is 5. c. Find the z scores that cut off the middle 50% of the normal curve. 13. This question is...
Let the following sample of 8 observations be drawn from a normal population with unknown mean...
Let the following sample of 8 observations be drawn from a normal population with unknown mean and standard deviation: 21, 20, 25, 18, 28, 19, 13, 22. [You may find it useful to reference the t table.] a. Calculate the sample mean and the sample standard deviation. (Round intermediate calculations to at least 4 decimal places. Round "Sample mean" to 3 decimal places and "Sample standard deviation" to 2 decimal places.) b. Construct the 90% confidence interval for the population...
5. The following random sample was selected from a normal distribution: 5 20 18 3 10...
5. The following random sample was selected from a normal distribution: 5 20 18 3 10 2 6 9 19 13 a) Construct a 90% confidence interval for the population mean μ: SHS b) Construct a 95% confidence interval for the population mean :
The following sample data are from a normal population: 10, 9, 12, 14, 13, 11, 6, 5
The following sample data are from a normal population: 10, 9, 12, 14, 13, 11, 6, 5 a. What is the point estimate of the population mean? b. What is the point estimate of the population standard deviation (to 2 decimals)? c. With 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)? d. What is the 95% confidence interval for the population mean (to 1 decimal)?
12. Using a normal distribution and z score formula answer the following questions: a. Find the...
12. Using a normal distribution and z score formula answer the following questions: a. Find the Z-score that cuts off the top 35% of the nornval curve b. Find the data value to the nearest whole number that cuts off the bottom 20% of the curve given that the mean is 75 and sample standard deviation is 5. c. Find the z scores that cut off the middle 50% of the normal curve. 13. This question is worth 4 points...
An independent random sample is selected from an approximately normal population with an unknown standard deviation....
An independent random sample is selected from an approximately normal population with an unknown standard deviation. a) Given the sample mean = 24.3, sample standard deviation = 8.5, and sample size = 32, compute the standard error. The standard error = b) Using a confidence coefficient of 2.04, compute the confidence interval. The 95% confidence interval goes from to (Enter the smaller number first.) c) Based on the confidence interval above, which of the following values are plausible? (Choose all...
(21) A sample of size 20 is drawn from a normal distribution with unknown variance and...
(21) A sample of size 20 is drawn from a normal distribution with unknown variance and mean. The sample variance s2 = 0.012. Find a 95% two-sided confidence interval for the standard deviation o of the population. A. [0.0833,0.1600] B. (0.010,0.0130] C. (0.0069,0.0256] D. None of the above
12 and 13
12. Using a normal distribution and z score formula answer the following questions: a. Find the Z-score that cuts off the top 35% of the nornval curve b. Find the data value to the nearest whole number that cuts off the bottom 20% of the curve given that the mean is 75 and sample standard deviation is 5. c. Find the z scores that cut off the middle 50% of the normal curve. 13. This question is...
For the following data: 1 2 3 4 5 6 16 20 18 17 18 21 a. Calculate the sample mean and sample variance b. Calculate the probability that the population mean is between 9 and 10 if the population standard deviation is known to be 2.3. What is the 95% confidence interval for the population mean if the population standard deviation is known to be 2.3? d. Calculate the 95% confidence interval using the sample standard deviation. c.
12-13 show work
12. Using a normal distribution and z score formula answer the following questions: a. Find the Z-score that cuts off the top 35% of the nornval curve b. Find the data value to the nearest whole number that cuts off the bottom 20% of the curve given that the mean is 75 and sample standard deviation is 5. c. Find the z scores that cut off the middle 50% of the normal curve. 13. This question is...
5. The following random sample was selected from a normal distribution: 5 20 18 3 10 2 6 9 19 13 a) Construct a 90% confidence interval for the population mean μ: SHS b) Construct a 95% confidence interval for the population mean :
12. Using a normal distribution and z score formula answer the following questions: a. Find the Z-score that cuts off the top 35% of the nornval curve b. Find the data value to the nearest whole number that cuts off the bottom 20% of the curve given that the mean is 75 and sample standard deviation is 5. c. Find the z scores that cut off the middle 50% of the normal curve. 13. This question is worth 4 points...
An independent random sample is selected from an approximately normal population with an unknown standard deviation. a) Given the sample mean = 24.3, sample standard deviation = 8.5, and sample size = 32, compute the standard error. The standard error = b) Using a confidence coefficient of 2.04, compute the confidence interval. The 95% confidence interval goes from to (Enter the smaller number first.) c) Based on the confidence interval above, which of the following values are plausible? (Choose all...
(21) A sample of size 20 is drawn from a normal distribution with unknown variance and mean. The sample variance s2 = 0.012. Find a 95% two-sided confidence interval for the standard deviation o of the population. A. [0.0833,0.1600] B. (0.010,0.0130] C. (0.0069,0.0256] D. None of the above
Most questions answered within 3 hours.
-
Two capacitors connected in parallel produce an equivalent
capacitance of 45.0 μF but when connected in...
asked 1 minute ago -
The differences between the two sets of dependent data are -1,
2,-,2, 2. Round to the...
asked 18 minutes ago -
A χ2-curve, looking at the relationship between age and hours
spent working at an office per...
asked 49 minutes ago -
The pH of a sample of water from a river is 5.0. A
sample of effluent from...
asked 1 hour ago -
At the beginning of the period, the Fabricating Department
budgeted direct labor of $136,500 and equipment...
asked 2 hours ago -
Please answer all
____ 28. Rent control is usually
justified on the grounds that it protects...
asked 2 hours ago -
PARTS A-D HAVE BEEN ANSWERED. WAS TOLD TO REPOST. ONLY ANSWER
PARTS E and F.
A...
asked 2 hours ago -
2) You are given the task of finding a representation for a
circle in a drawing...
asked 3 hours ago -
STUDY QUESTION: Does use of diet drug fen-phen
(fenfluramine-phentermine) cause valvular heart disease?
HINT: Valvular heart...
asked 3 hours ago -
1. An object weighing 40 N rests on a surface. The coefficient
of friction is 0.35....
asked 4 hours ago -
Investor company owns 35% of investee company voting stock and
accounts for the investment under the...
asked 5 hours ago -
The number of major faults on a randomly chosen 1 km stretch of
highway has a...
asked 6 hours ago