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A real estate broker hoped to develop an equation that could be used to predict the sales price of homes in a certain suburb. It seemed to him that the most important variables, since all the homes were in pretty much the same locale, were age of house, square feet, and number of bedrooms.
_ _X=7.1 Y=90.7 x=0.4 y=-0.2 Sigma x^2=87.76Sigma y^2=2481.44 Sigma xy=408.62
Determine the relationship between sales price and age of house and determine the correlation coefficient.
Is the age of the house significant factor at alpha=0.05 in determining sales price? Explain
What does the fact that the correlation is less than 100% suggest?
Note that under the exponential assumption, P(X>t) = exp(-t/theta). If t=5, use the result from (a) to find an approximate one-sided lower 95% confidence limit for theta.
Test at the 5% level whether the incidence of smoking depends on the age category
Which of the given properties doesn't apply to theoretical normal distribution?
The price of XYZ Corporation stock is normally distributed all through the year with mean of $42.00 per share and a standard deviation of $2.25 per share. Suppose that the stock is traded 240 days out of the year.
Write complete linear programming model (All three parts) to find out the number of items to be transported from models A, B, C, and D to nodes 1 and 2 at minimum cost.
Use descriptive statistics to explain how parental involvement and interests in child's education can impact on educational attainment measured in terms of their numeracy (v24_7), literacy (v28_7) and creativity skills (v25_7 and v26_7)
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
Determine margin of error for confidence interval in (a)?
For a sample of students in the college of business administration at mid-atlantic university, the mean grade point average is 3.10 with a standard deviation of 0.25.
The diameter of stabilizing O-Rings washers manaufactured at a large factory is expected to be normally distributed with a mean of 1.30 inches and a standard deviation of 0.04 inches.
Explain what property associated with the Central Limit Theorem you consider the most important contribution, enabling the use of the normal distribution for sample means.
Only 10% of American adults can name the capital of the Czech Republic. On a television game show the three randomly selected contestants are given the question "What is the capital of the Czech Republic?" The probability that none of them will kn..
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