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Many economic relationships are characterized by diminishing marginal returns. These occur when the effects of increasing inputs (for example, spending for advertising) no longer produce the same magnitude of outputs, such as product sales. If you suspect the effect of an explanatory variable to have this form, what should you do?
Use descriptive statistics to summarize the data.
an interaction affect that is not significant indicates thata. the influence of one factor is not the same for each
Let P(x) = xn + an-1xn-1 + an-2xn-2 + ··· + a1x + a0 and T:= 1 + max(0≤i≤n-1) |ai|. Find a bound on the roots of the polynomial P(x) = -7x4 + 2x3 - 3x2 + 4x +5 and relate it to the actual values of the roots
Compute a 95% confidence interval for the difference between the recall proportions for the two populations.
Gasoline and number of gallons sold. For sample of 14 stations last Tuesday, correlation was 0.83. At 0.05 significance level, is correlation in population greater than zero?
ABC Corp. is a firm with all-equity financing. Its equity beta is .80. The Treasury bill rate is 4 per cent and, and the market risk premium is expected to be 10 per cent. What is ABC's asset(equity) beta?
the percentage of values in some commonly used intervals area 68.3 of the values of a normal random variable are within
completion time from start to finish of a building remodeling project is normally distributed with a mean of 200
Fair die is rolled 10 times. Determine the probability that the odd number (1, 3 or 5) will occur less than 4 times?
the go transportation system of buses and cumuter trains operates on the honor system. train travers are expected to
Population and the sample proportion of grandparents as primary caregivers (-hat) is to be calculated. What is the mean of the sampling distribution of -hat?
The random variable x is known to be uniformly distributed between 1.0 and 1.5.
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