If a data set produces a coefficient of determination of .36, is this enough information to determine the correlation coefficient? Explain.
What will be an ideal response?
No, the coefficient of determination is r-squared. When taking the square root to find r, the correlation coefficient, r could be positive or negative .6.
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The average lifetime of a light bulb is 3,000 hours with a standard deviation of 696 hours. A simple random sample of 36 bulbs is taken.
a.What are the expected value, standard deviation, and shape of the sampling distribution of 
?b.What is the probability that the average life in the sample will be between 2,670.56 and 2,809.76 hours?c.What is the probability that the average life in the sample will be greater than 3,219.24 hours?d.What is the probability that the average life in the sample will be less than 3,180.96 hours?
What will be an ideal response?
The primary task of the ________ phase of the traditional SDLC is to determine the user requirements of the new system
A) maintenance B) design C) implementation D) analysis E) investigation