Can you help find the standard deviation of the sample mean differences?
The standard deviation of a sample taken from population A is 17.6 for a sample of 25.
The standard deviation of a sample taken from population B is 21.2 for a sample of 30.
Can you help find the standard deviation of the sample mean differences? The standard deviation of...
For each of the following, find the mean and standard deviation of the sampling distribution of the sample mean. State if the sampling distribution is normal, approximately normal, or unknown. a. The population is skewed right with a mean of 4 and a standard deviation of 6. Many samples of size 100 are taken. b. The population is normal with a mean of 61 and a standard deviation of 9. Many samples of size 900 are taken. c. The population...
Use the Central Limit Theorem for Sums to find the sample mean and sample standard deviation Question Suppose weights, in pounds, of dogs in a city have an unknown distribution with mean 26 and standard deviation 3 pounds. A sample of size n = 67 is randomly taken from the population and the sum of the values is computed. Using the Central Limit Theorem for Sums, what is the mean for the sample sum distribution? Provide your answer below: pounds
Here is an example with steps you can follow: sample size n=9, sample mean=80, sample standard deviation s=25 (population standard deviation is not known) Estimate confidence interval for population mean with confidence level 90%. Confidence Interval = Sample Mean ± Margin of Error Margin of Error = (t-value)×s/√n t-value should be taken from Appendix Table IV. For n=9 df=n-1=9-1=8 For Confidence Level 90% a = 1 - 0.90 = 0.10, a/2 = 0.10/2 = 0.05 So, we are looking for...
A sample of 30 paired differences yielded a sample mean of = 5 and a sample standard deviation of 7. What is the value of the test statistic used to test the null hypothesis that the population mean difference is 0? Round your answer to 2 decimal places.
Use the formula to find the standard error of the distribution of differences in sample means, . Samples of size 120 from Population 1 with mean 82 and standard deviation 13 and samples of size 80 from Population 2 with mean 70 and standard deviation 18 Round your answer for the standard error to two decimal places.
Use the formula to find the standard error of the distribution of differences in sample means, X1 - X2 . Samples of size 100 from Population 1 with mean 92 and standard deviation 11 and samples of size 70 from Population 2 with mean 70 and standard deviation 15. Round your answer for the standard error to two decimal places. standard error =
Use the formula to find the standard error of the distribution of differences in sample means, x¯1-x¯2. Samples of size 110 from Population 1 with mean 94 and standard deviation 12 and samples of size 70 from Population 2 with mean 76 and standard deviation 15 Round your answer for the standard error to two decimal places.
Use the formula to find the standard error of the distribution of differences in sample means, x ¯ 1 - x ¯ 2 . Samples of size 40 from Population 1 with mean 3.2 and standard deviation 1.9 and samples of size 40 from Population 2 with mean 2.9 and standard deviation 1.1 Round your answer for the standard error to two decimal places.
Use the formula to find the standard error of the distribution of differences in sample means, x¯1-x¯2 . samples of size 105 from population 1 with mean 92 and standard deviation 11 and samples of size 70 from population 2 with mean 78 and standard deviation 15 Round your answer for the standard error to two decimal places. standard error =
(a) find the sample mean (b) find the sample standard deviation (c) Construct a 99% confidence interval for the population mean μ. 6.2.31-T Question Help The monthly incomes for 12 randomly selected people, each with a bachelor's 4450.24 degree in economics, are shown on the right. Complete parts (a) through (c) 4455.36 below. 4283.33 Assume the population is normally distributed. 3946.14 4596.57 4151.27 4527.47 4023.48 4366.61 3727.14 4407.49 4221.28 (a) Find the sample mean. x = || (Round to one...