With a known population mean of 68 and a known standard error of the mean of...
With a known population mean of 68 and a known standard error of the mean of 2.58, what is the probability of selecting at random a sample whose mean is 70 or greater?
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With a known population mean of 68 and a known standard error of
the mean of...
A sample of size 40 will be taken from a population whose mean and standard deviation...
A sample of size 40 will be taken from a population whose mean and standard deviation are 68 and 12, respectively. Calculate the probability that the sample mean will be greater than or equal to 70. (3 decimal places)
A normal population has a mean of 68 and a standard deviation of 6. You select...
A normal population has a mean of 68 and a standard deviation of 6. You select a sample of 52. Compute the probability that the sample mean is (round z score 2 decimals and final answer 4): 1) Less than 67 2) Between 67 and 69. 3) 69 and 70 4) greater and 70
Suppose your marketing colleague used a known population mean and standard deviation to compute the standard...
Suppose your marketing colleague used a known population mean and standard deviation to compute the standard error as 56.4 for samples of a particular size. You don't know the particular sample size but your colleague told you that the sample size is greater than 70. Your boss asks what the standard error would be if you triple the sample size. What is the standard error for the new sample size? Please round your answer to the nearest tenth.
1. A population is known to have a mean of 10 and a standard deviation of 1.1....
1. A population is known to have a mean of 10 and a standard deviation of 1.1. A sample of size 32 is randomly selected from the population. a. What is the probability that the sample mean is less than 9.9? b. What percent of the population is greater than 10.2? c. What’s the probability that the sample mean is greater than 10.5?
Suppose your marketing colleague used a known population mean and standard deviation to compute the standard...
Suppose your marketing colleague used a known population mean and standard deviation to compute the standard error as 49.6 for samples of a particular size. You don't know the particular sample size but your colleague told you that the sample size is greater than 60. Your boss asks what the standard error would be if you double the sample size. What is the standard error for the new sample size? Please round your answer to the nearest tenth.
5.4.1 Question Help A population has a mean = 141 and a standard deviation o =...
5.4.1 Question Help A population has a mean = 141 and a standard deviation o = 28. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 40. The mean is :-), and the standard deviation is 0;=0 (Round to three decimal places as needed.) 5.4.2 Question Help A population has a meanu - 74 and a standard deviation = 8. Find the mean and standard deviation of a sampling distribution of...
C) the standard deviation of the population is known D) both the underlying population is normal...
C) the standard deviation of the population is known D) both the underlying population is normal and the sample size n 30 are correct II. Calculation Questions. (2 points) 5. A random sample of size n=50 is taken from a population with mean μ =-9.5 and standard deviation 2. Calculate the expected value and standard error for the sampling distribution of the sample mean. What is the probability that the sample mean is less than -10? a. b. c. What...
Given a normal population which has a mean of 70 and a standard deviation of 14,...
Given a normal population which has a mean of 70 and a standard deviation of 14, find the probability that a random sample of 49 has a mean between 68 and 71. Report your answer to four decimal places.
25> Consider a variable known to be Normally distributed with unknown mean μ and known standard...
25> Consider a variable known to be Normally distributed with unknown mean μ and known standard deviation σ-10. (a) what would be the margin of error of a 95% confidence interval for the population mean based on a random sample size of 25? The multiplier for a z confidence interval with a 95% confidence level is the critical value z. 1.960. (Enter your answer rounded to three decimal places.) margin of error 25 (b) What would be the margin of...
5.4.17 Question Help The population mean and standard deviation are given below. Find the required probability...
5.4.17 Question Help The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual. For a sample of n = 70, find the probability of a sample mean being greater than 220 if u = 219 and 6 = 3.5. For a sample of n = 70, the probability of a sample mean being greater than 220 if u = 219 and o = 3.5 is (Round...
5.4.1 Question Help A population has a mean = 141 and a standard deviation o = 28. Find the mean and standard deviation of the sampling distribution of sample means with sample size n = 40. The mean is :-), and the standard deviation is 0;=0 (Round to three decimal places as needed.) 5.4.2 Question Help A population has a meanu - 74 and a standard deviation = 8. Find the mean and standard deviation of a sampling distribution of...
C) the standard deviation of the population is known D) both the underlying population is normal and the sample size n 30 are correct II. Calculation Questions. (2 points) 5. A random sample of size n=50 is taken from a population with mean μ =-9.5 and standard deviation 2. Calculate the expected value and standard error for the sampling distribution of the sample mean. What is the probability that the sample mean is less than -10? a. b. c. What...
25> Consider a variable known to be Normally distributed with unknown mean μ and known standard deviation σ-10. (a) what would be the margin of error of a 95% confidence interval for the population mean based on a random sample size of 25? The multiplier for a z confidence interval with a 95% confidence level is the critical value z. 1.960. (Enter your answer rounded to three decimal places.) margin of error 25 (b) What would be the margin of...
5.4.17 Question Help The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual. For a sample of n = 70, find the probability of a sample mean being greater than 220 if u = 219 and 6 = 3.5. For a sample of n = 70, the probability of a sample mean being greater than 220 if u = 219 and o = 3.5 is (Round...
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