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Develop a 95% confidence interval on the population proportion based on the sample results. Determine how large a sample she would need to take in order to be 99% certain that the maximum error in t
A statistical model for appraisal value of houses is needed. An important predictor variable of appraised value is the number of rooms in any house; y = appraised value of the house (in thousands of
Locate the results of a recent survey in a newspaper, magazine, or Internet article. Outline the survey data so that your peers can understand the variables and results, and then identify at least o
In this sample the mean NEFA was 435 with a standard deviation of 215. construct a 95% confidence intercal estimate of the mean fasting NEFA level for a population of women with gestational diabetes
A random sample of 16 emergency reports was selected from the files of an ambulance service. The mean time( computed from these sample data) required for ambulances to reach their destinations was 1
Describe a situation when you would prefer the median and the inter quartile range in describing a distribution over the mean and the standard deviation.
Grear Tire Company has produced a new tire with an estimated mean lifetime mileage of 37,500 miles. Management also believes that the standard deviation is 6,000 miles and that tire mileage is norma
Obtain a 95% confidence interval estimate for population varience, the standard deviation of the experimental group. Test the hypothesis that the experiment was effective at the alpha=0.05 significanc
As a part of the editorial a random sample of 310 households showed 230 own pets. Does this data disagree with the Pet Food Dealers Association data? Use a 0.10 level of significance. State the dec
Draw a graph of the possible sample proportions that would result from samples of 800 people from a population with a true proportion of .50.
The cost of a one-carat VS2 clarity, H color diamond from Diamond Source USE is $5,600. A midwestern jeweler makes calls to contacts in the diamond district of New York City to see whether the mean
What is the probability that a vehicle passing through the construction zone exceeds the posted speed limit? How many cars do you expect to exceed the posted speed limit if 40,000 vehicles passed thr
The data to the right represents the number of days of the growing season over the last 10 years in a certain area It is known that the data are normally distributed and s=23.89 days. Using these va
Using these values as a simple random sample, construct an 80% confidence interval for the population standard deviation of the number of days in the growing season. 164, 188,206, 212, 168, 145, 208
People arrive at a college admissions office at rate 1 per minute. When k people have arrive a tour starts. Student tour guides are paid $20 for each tour they conduct. The college estimates that it
Find the solution of the system of linear equations below using the Gauss-Jordan elimination method. Enter your answer for each variable in the appropriate box for that variable. Use integers or fra
Determine the 90% Confidence interval estimate for the mean number of hours of television watched per week by shut-ins. Assume the number of hours is normally distributed.
For the population of infants subjected to fetal surgery for congenital anomalies, the distribution of gestational ages at birth is approximately normal with unknown mean µ and standard deviat
For each $1 worth of output, the manufacturing sector requires $.25 worth of input from the agriculture sector, $.12 worth of input from the energy sector, and $.05 worth of input from the manufactu
In determining the range of an acoustic source by triangulation, one must accurately measure the time at which the spherical wave front arrives at a receiving sensor.
In a class of 50 students, the result of a particular examination is a true mean of 70 and a true variance of 12. It is desired to estimate the mean by sampling, without replacement, a subset of the
We are interested in relationship satisfaction of young adults before and after they go off to college/university which separates them from their sweat-heart. We collect a sample of young adults whi
A professor is interested in the number of students who use the campus library for academic purposes. She takes a random sample of 30 UNLV students and finds that 7 of them have used the library. Es
A bank branch wants to estimate the proportion of all customers who visit the bank primarily to use the outdoor ATM. In a random sample of 300 customers, 223 had come to the branch primarily to use
You are trying to estimate the number of CSN students with iPhones. A random sample of 130 students reveals that 65 of them have an iPhone. Estimate the percentage of all CSN students who have iPho