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Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n=550, x=165, 90% confidence ___< p < ___
Assume that a random sample is used to estimate a population p. find the margin of error E that corresponds to the given statistics and confidence level. n=500, x=250, 95% confidence The margin of e
Use the given information to find the minimum sample size required to estimate an unknown population mean. How many adults must be randomly selected to estimate the mean FICO score of working adults
How large of a sample, n, would you need to estimate p with margin of error 0.01 with 95% confidence? use the guess p=0.05 as the value for p.
A company is studying the number of monthly absences among its 125 employees. The following probability distribution shows the likelihood that people were absent 0, 2, 4, 6, 8, or 11 days last month
What is the relationship between Sample Size and the width of the Confidence Interval? Please explain further as to why. &Discuss the effect that the confidence level has upon the confidence int
The life expectancy of point-of-sale (POS) terminals is normally distributed with a mean of 4 years and a standard deviation of 10 months.
The following probability distribution shows the likelihood that people were absent 0, 3, 4, 6, 8, or 11 days last month. Number of days absent Probability 0 0.51 3 0.24 4 0.13 6 0.06 8 0.06 11 0 Wh
Find the area under the standard normal curve which lies between z = 0.72 and z = 1.59
For each of the cases below, involving areas under the standard normal curve, decide whether the first area is bigger, the second area is bigger, or both areas are equal.
A population has a mean of 81 and standard deviation of 25. Find the mean and standard deviation of sampling distribution of a sample means with sample size 262.
Again, consider the trials involved with flipping a fair coin. It is reasonable to assume that coin flips are "independent." What is the probability of observing two "heads" outcomes in two consecut
In a survey of undergraduate library usage, it was found that 76% of seniors, 59% of juniors, 50% of sophomores, and 28% of freshmen use the library frequently. Suppose that 17% of the undergraduate
The purpose of this process is to ensure the defect rate is no more than 6%. Occasionally, by bad luck, even if the defect rate is no more than 6%, more than one defective tire is found from the ch
A 95% confidence interval for the population mean birth weight based on these data is A. 119.6 ± 3.23 ounces. B. 119.6 ± 3.00 ounces. C. 119.6 ± 0.76 ounces
How many ways is it possible to observe a sample of n=7 observations from a population of N=10 observations in which the order of those observations in each sample does not matter?
Suppose the amount of a popular sport drink in bottles leaving the filling machine has approximately a normal distribution with mean 101.5 milliliters (ml) and standard deviation 1.6 ml. a. If the b
You are evaluating two portfolios for your personal investment on the basis of their return.
A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 80% of the time if the person has the virus and 5% of the time if the person does not have th
A random sample of 25 was drawn from a normal distribution with a standard deviation of 5. The sample size is 400. Determine the 95% confidence interval estimate of the population mean.
A sample set of 29 scores has a mean of 76 and a standard deviation of 7. Can we accept the hypothesis that the sample is a random sample from a population with a mean greater than 72? Use _ _ 0.011
Please answer this question using R code. The answer for this quesiton can be easily be found with a google search, thats not what i'm looking for. I'm looking to do this using R. If you don't know
Milk delivery at a local supermarket consisted of 50 liter-sized containers of which 3 were spoiled. If you purchase 2 containers, the probability of not selecting a spoiled one is an example of a _