The standard deviation of the lengths of hospital stay on the intervention ward is 7.4 days....
The standard deviation of the lengths of hospital stay on the intervention ward is 7.4 days. Complete parts (a) through (c) below. a. For the variable "length of hospital stay," determine the sampling distribution of the sample mean for samples of 91 patients. The standard deviation of the sample mean is sigma Subscript x overbarequals 0.7757 days. (Round to four decimal places as needed.) b. The distribution of the length of hospital stay is right skewed. Does this invalidate your result in part (a)? Explain your answer. A. No, because if x overbar is normally distributed, then x must be normally distributed. B. Yes, because the sample sizes are not sufficiently large that x overbar will be approximately normally distributed, regardless of the distribution of x. C. Yes, because x overbar is only normally distributed if x is normally distributed. D. No, because the sample sizes are sufficiently large that x overbar will be approximately normally distributed, regardless of the distribution of x.
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The standard deviation of the lengths of hospital stay on the
intervention ward is 7.4 days....
Question Help The standard deviation of the lengths of hospital stay on the intervention ward is...
Question Help The standard deviation of the lengths of hospital stay on the intervention ward is 78 days. Come parts through (c) below a. For the variable length of hospital stay." determine the sampling distribution of the sample mear for samples of patients The standard deviation of the sample mean is days. (Round to four decimal places as needed.) b. The distribution of the length of hospital stayis right skewed Does this invalidate your result in part (a? Explain your...
A simple random sample of size nequals64 is obtained from a population with muequals43 and sigmaequals8....
A simple random sample of size nequals64 is obtained from a population with muequals43 and sigmaequals8. Does the population need to be normally distributed for the sampling distribution of x overbar to be approximately normally distributed? Why? What is the sampling distribution of x overbar? Does the population need to be normally distributed for the sampling distribution of x overbar to be approximately normally distributed? Why? A. Yes because the Central Limit Theorem states that only for underlying populations that...
Data on salaries in the public school system are published annually by a teachers' association. The...
Data on salaries in the public school system are published annually by a teachers' association. The mean annual salary of public) classroom teachers is 557.7 thousand. Assume a standard deviation of $8.4 thousand. Complete parts (a) through (e) below a. Determine the sampling distribution of the sample mean for samples of size 64. The mean of the sample mean is Hy = $(Type an integer or a decimal. Do not round.) The standard deviation of the sample mean is =$(Type...
the average length of a hospital stay is 4.8 days. if we assume the lengths of...
the average length of a hospital stay is 4.8 days. if we assume the lengths of hospital stays are normally distributed with a standard deviation of 1.499, then 10% of hospital stays are longer than how many days?
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean...
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 281 days μ=281 days and standard deviation sigma equals 28 days. (b) Suppose a random sample of 21 pregnancies is obtained. Describe the sampling distribution of the sample mean length of pregnancies. The sampling distribution of x is _____ (skewed left, skewed right, normal) with u-x = _____ and o-x= _____. (Round to 4 decimal places as needed)
d The f te om Teachers is 553 thousand Data on alles in the public school...
d The f te om Teachers is 553 thousand Data on alles in the public school systems are published by a bran parts (a) through ) below a. Determine the sampling distribution of the sample mean for sample of The mean of the sample meanis 5 (Type an integradacina De S standard of Care ound) The standard deviation of the sample meanis, S (Type an integradecimal Do not found) b. Determine the sampling abution of the sam e for samples...
Use the central limit theorem to find the mean and standard error of the mean of...
Use the central limit theorem to find the mean and standard error of the mean of the indicated sampling distribution. Then sketch a graph of the sampling distribution. The per capita consumption of red meat by people in a country in a recent year was normally distributed, with a mean of 115 pounds and a standard deviation of 38.2 pounds. Random samples of size 15 are drawn from this population and the mean of each sample is determined. mu Subscript...
A population has a mean muequals81 and a standard deviation sigmaequals18. Find the mean and standard...
A population has a mean muequals81 and a standard deviation sigmaequals18. Find the mean and standard deviation of a sampling distribution of sample means with sample size nequals36. mu Subscript x overbarequals nothing (Simplify your answer.)
The length of maternity stay in U.S. hospitals is normally distributed, with mean of 3.5 days...
The length of maternity stay in U.S. hospitals is normally distributed, with mean of 3.5 days and a standard deviation of 0.5 days. We randomly survey 62 women who recently bore children in U.S. hospitals. Let Xmaternity stay in U.S. hospital, and Xaverage maternity stay for a sample of size 62 a. (30) Xickone) .) b. (.30) X ~ (pick one) . (.40) Which of the following is more likely? Oan individual stays more than 5 days the average stay...
a variable of a population has a mean of 79 and a standard deviation of 18....
a variable of a population has a mean of 79 and a standard deviation of 18. a. Identify the sampling distribution of the sample mean for samples of size 81. b. In answering part (a), what assumptions did you make about the distribution of the variable? c. Can you answer part (a) if the sample size is 25 instead of 81? Why or why not? a. What is the shape of the sampling distribution? uniform bimodal skewed normal? What is...
Question Help The standard deviation of the lengths of hospital stay on the intervention ward is 78 days. Come parts through (c) below a. For the variable length of hospital stay." determine the sampling distribution of the sample mear for samples of patients The standard deviation of the sample mean is days. (Round to four decimal places as needed.) b. The distribution of the length of hospital stayis right skewed Does this invalidate your result in part (a? Explain your...
Data on salaries in the public school system are published annually by a teachers' association. The mean annual salary of public) classroom teachers is 557.7 thousand. Assume a standard deviation of $8.4 thousand. Complete parts (a) through (e) below a. Determine the sampling distribution of the sample mean for samples of size 64. The mean of the sample mean is Hy = $(Type an integer or a decimal. Do not round.) The standard deviation of the sample mean is =$(Type...
d The f te om Teachers is 553 thousand Data on alles in the public school systems are published by a bran parts (a) through ) below a. Determine the sampling distribution of the sample mean for sample of The mean of the sample meanis 5 (Type an integradacina De S standard of Care ound) The standard deviation of the sample meanis, S (Type an integradecimal Do not found) b. Determine the sampling abution of the sam e for samples...
The length of maternity stay in U.S. hospitals is normally distributed, with mean of 3.5 days and a standard deviation of 0.5 days. We randomly survey 62 women who recently bore children in U.S. hospitals. Let Xmaternity stay in U.S. hospital, and Xaverage maternity stay for a sample of size 62 a. (30) Xickone) .) b. (.30) X ~ (pick one) . (.40) Which of the following is more likely? Oan individual stays more than 5 days the average stay...
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