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Assume that you have selected 10 students enrolled at your college and have collected data for these three variables:
X: number of courses enrolledY: total cost of text books and supplies for coursesZ: method of payment used for textbooks and supplies
a) What is the population?
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
In a random sample of 53 concrete specimens, the average porosity (in percent) was 21.6 and the standard deviation was 3.2. a) Find a 90% confidence interval for the mean porosity of specimens of this type of concrete.
Find a 90% confidence interval for the population mean salary of such personnel. What is the margin of error.
Aggregate the opinions of the experts by computing the minimum, maximum, 25 th percentile, 50 th percentile, and 75 th percentile values.
In this forum post provide your results also elucidate what they mean in context of your favorite channel. To find 95 percent confidence interval for given data.
Determine the probability that she lives in an all electric home?
Use the normal distribution to approximate the following probability: According to the most recent Davenport student profile, 47% of students have children under 17 living at home with them.
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
The response variable is the change in cholesterol level after two months of treatment. An analysis of variance will be used to compare the three treatments. What null hypothesis is tested by this ANOVA F-test?
For this same sample of n = 45, find out the width of confidence interval around population mean? Illustrate all work.
Solve problem graphically1. Describe optimal solution and objective function value in context of the problem.
Jamie expects that a bulb will last for 400 to 500 days, what is the probability of an Acme bulb satisfying that?
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