Interpret a 90% confidence interval of (4.355, 4.445) for a population mean.

Describe four cardiovascular conditions that may lead to heart failure and what can be done in the form of medical/nursing interventions to prevent the development of heart failure in each condition.
January 7, 2019
How does this value compare with the values for Sunnyvale Clinic and BestCare?
January 7, 2019


11In standard normal distribution the means is always (Points : 3)

2. The area under the standard normal curve is (Points : 3)
3. 3.If Larry gets a 70 on a physics test where the mean is 65 and the standard deviation is 5.5.8, where does he stand in relation to his classmates? (Points : 3)
4. In a normal distribution with mu = 25 and sigma = 3, what number corresponds to z = -3? (Points : 3)
5. Let s assume you have taken 100 samples of size 49 each from a normally distributed population. Calculate the standard deviation of the sample means if the population s variance is 16. (Points : 3)
6. The area to the left of z is 0.9976. What z-score corresponds to this area? (Points : 3)
7. Find P(9
8. What is the critical z-value that corresponds to a confidence level of 88%? (Points : 3)
9. Compute the population mean margin of error for a 95% confidence interval when sigma is 4 and the sample size is 36. (Points : 3)
10. A standard IQ test has a mean of 98 and a standard deviation of 16. We want to be 90% certain that we are within 8 IQ points of the true mean. Determine the sample size. (Points : 3)
11. A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $200 of the true mean. The clinic estimates that the true population standard deviation is around $1,300. If the confidence level is 95%, find the required sample size in order to meet the desired accuracy. (Points : 6)
112. An auditor wants to estimate what proportion of a bank s commercial loan files are incomplete. The auditor wants to be within 7% of the true proportion when using a 95% confidence level. How many files must the auditor sample? No estimate of the proportion is available, so use 0.5 for the population proportion. (Points : 6)


IInterpret a 90% confidence interval of (4.355, 4.445) for a population mean.

A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 200 of its alumni. The mean annual income was $55,200 with a standard deviation of $1,500. Find a 95% confidence interval for the true mean annual income of the nursing school alumni. Write a statement about the confidence level and the interval you find


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