Reference no: EM13104530
Question 1: Suppose we have the following information from a simple regression:
-What is the coefficient of determination??
-What is the correlation coefficient?
-What is the sample mean of Y??
-Test the hypothesis vs. , with ? = 0.05.
Question 2: survey 35 students and find that the mean daily spending is $63.57 with a sample standard deviation of $17.32.
-Develop a 95% confidence interval for the population mean daily spending.
-What level of confidence is associated with an interval of $58.62 to $68.52 for the population mean daily spending?
Question 3: wholesaler finds that 229 of the previous 500 calls to hardware store owners resulted in new product placements. Assume these 500 calls represent a random sample.
-Find a 95% confidence interval for the long-run proportion of new product placements.
-What level of confidence is associated with an interval of .400513 to .515487 for the long-run proportion of new
Question 4: The following results were obtained for a sample of n =20 restaurants of approximately equal size:
Where:
y = Number of bottles of imported premium beer sold, and
x = Average cost, in dollars, of a meal.
-Determine the sample regression line.
-Interpret the slope of the sample regression line.
-Is it possible to provide a meaningful interpretation of the intercept of the sample regression line? Explain.
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Claiming sugar packaging
: Sugar packaged by a certain machine has a mean weight of 5lb and a standard deviation of 0.02 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 - c and 5 + c lb with..
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Determine the mass of the second particle in kg
: Two equally charged particles, held 22.4 cm apart, are released from rest. The initial acceleration of the first particle is observed to be 4.0 m/s2 and that of the second particle is 6.0 m/s2. If the mass of the first particle is 3.40 x 10-7 kg, ..
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Description of confidence interval problem
: A random sample of 17 wolf litters in Ontario, Canada gave an average of x1= 4.9 wolf pups per litter, with estimated sample standard deviation s1 - 1.0.
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Find magnitude of the force between two point charges
: Determine the magnitude of the force between two point charges, Q1 = -2e located at (-3.60 cm, +4.10 cm) and Q2 = -8e located at (-0.60 cm, -8.60 cm).
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Find regression lline and confidence interval
: Suppose we have the following information from a simple regression: What is the coefficient of determination? What is the correlation coefficient?
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Explain meaning of civil war would give new birth of freedom
: What did Abraham Lincoln mean when he said that Civil War would give the new birth of freedom? Using the three course themes as the framework of analysis (Liberty, Equality and Power).
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Find the x and y components and the magnitude and direction
: Find the x and y components and the magnitude and direction of the electric field at the following points. Find the x and y components and the magnitude of the electric field at the origin.
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Examples of a random variable
: In addition parking time variable collected by the administration is an example of a ___________ random variable and parking are variable is an example of a ____________ random variable.
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How american airlines reduce costs and increase profits
: Discuss the techniques on how American Airlines uses in order to reduce costs and increase profits. The task for this activity goes beyond inventory management.
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