The mean number of years employees stay with a company is 12 years with a population...
The mean number of years employees stay with a company is 12 years with a population standard deviation 4 years. The distribution of years has a left skewed shape. The probability that the mean years of staying in the company for a randomly selected sample of 36 will be more than 14 years is?
If the CLT holds, find this probability. If you do not believe the CLT holds, enter 0 as your answer.
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The mean number of years employees stay with a company is 12
years with a population...
The distribution of weekly salaries at a large company is right-skewed with a mean of $1000...
The distribution of weekly salaries at a large company is right-skewed with a mean of $1000 and a standard deviation of $350. a) Determine the sampling distribution of the mean salary for samples of size 60. b) If a sample of weekly salaries of 60 employees is randomly selected, what is the probability that the sample mean salary will be within $50 of the population mean $1000 (the mean weekly salary for all employees)?
A researcher is interested in determining the average number of years employees of a company stay with the company.
A researcher is interested in determining the average number of years employees of a company stay with the company. If past information shows a standard deviation of 7 months, what size sample should be selected so that at 95% confidence the margin of error will be 2 months or less?
4 -10 points JKEStatt1 7 E 021 A certain population has a mean of 455 and...
4 -10 points JKEStatt1 7 E 021 A certain population has a mean of 455 and a standard deviation of 36. Many samples of size 53 are randomly selected and the means calculated. (a) What value would you expect to find for the mean of all these sample means? (Give your answer correct to nearest whole number.) b) What value would you expect to find for the standard deviation of all these sample means? (Give your answer correct to two...
a population is slightly skewed to the right has a mean of 77 and a standard...
a population is slightly skewed to the right has a mean of 77 and a standard deviation of 12. If a random sample of 28 items are selected from this population, then the mean score of these 28 items is from a sampling distribution that jas a mean of...? a population is slightly skewed to the left has a 56 and a standard deviation of 8. If a random sample of 32 items are selected from this population, then the...
Name: Wit: SAMPLING DISTRIBUTION EXERCISE The average length of a hospital stay in general or community...
Name: Wit: SAMPLING DISTRIBUTION EXERCISE The average length of a hospital stay in general or community hospitals in the United States is 6 days Assume that the population standard deviation is 7.7 days. A simple random sample of 49 patients is drawn from this population. 1. What is the sampling distribution of the sample mean? 2. What is the probability that the average length of stay for this group of patients will be no more thana week? 3. What is...
A certain population has a mean of 521 and a standard deviation of 33. Many samples...
A certain population has a mean of 521 and a standard deviation of 33. Many samples of size 52 are randomly selected and the means calculated. (a) What value would you expect to find for the mean of all these sample means? (Give your answer correct to nearest whole number.) (b) What value would you expect to find for the standard deviation of all these sample means? (Give your answer correct to two decimal places.) (c) What shape would you...
To estimate the mean age for a population of 4000 employees, a simple random sample of...
To estimate the mean age for a population of 4000 employees, a simple random sample of 40 employees is selected. If the population standard deviation is 8.2 years, computer the standard error of the mean. (Round to one decimal place) Answer What is the probability that the sample mean age of the employees will be within 2 years of the population mean age? (Round to four decimal places) Answer
The number of vacation days taken by the employees of a company is normally distributed with...
The number of vacation days taken by the employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. Is this a case of sample standard deviation or population standard deviation? What are some differences between sample standard deviation and population standard deviation? For the next employee, what is the probability that the number of days of vacation taken is less than 10 days? What is the probability that the number...
1) In a population survey of patients in a rehabilitation hospital, the mean length of stay...
1) In a population survey of patients in a rehabilitation hospital, the mean length of stay in the hospital was 12.0 weeks with a standard deviation equal to 1.0 week. The population distribution was normal. a. Out of 100 patients how many would you expect to stay longer than 13 weeks? b. What is the percentile rank of a stay of 11.3 weeks? c. What percentage of patients would you expect to stay between 11.5 weeks and 13.0 weeks? 2)On...
A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10
A random sample of size 36 is to be selected from a population that has a mean μ = 50 and a standard deviation σ of 10. * a. This sample of 36 has a mean value of , which belongs to a sampling distribution. Find the shape of this sampling distribution. * b. Find the mean of this sampling distribution. * c. Find the standard error of this sampling distribution. * d. What is the...
4 -10 points JKEStatt1 7 E 021 A certain population has a mean of 455 and a standard deviation of 36. Many samples of size 53 are randomly selected and the means calculated. (a) What value would you expect to find for the mean of all these sample means? (Give your answer correct to nearest whole number.) b) What value would you expect to find for the standard deviation of all these sample means? (Give your answer correct to two...
Name: Wit: SAMPLING DISTRIBUTION EXERCISE The average length of a hospital stay in general or community hospitals in the United States is 6 days Assume that the population standard deviation is 7.7 days. A simple random sample of 49 patients is drawn from this population. 1. What is the sampling distribution of the sample mean? 2. What is the probability that the average length of stay for this group of patients will be no more thana week? 3. What is...
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