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1. Financial advising The tips from the financial advis- ers suggest that it may be useful to incorporate the number of credit lines on a log scale in this model rather than a linear scale as in Table 4. Do you agree? Why or why not?
2. Financial advising In skimming the marginal distri- butions (histograms or bar charts) of other explana- tory variables in the fee data, what other problems do you find?
The true population regression function, it isn"t. Before leaving this section we should ask and answer the following question. What"s so special about polynomials?
A lending institution supplied the following data on loan approvals by four loan officers. Conduct an appropriate Hypothesis test to determine whether the loan approval decision is independent of the loan officer reviewing the loan application.
(a) Plot the GDP time series graphically. (b) Calculate the least squares trendline for GDP. (c) Use this equation to predict the country's GDP for 2012 and 2013.
the joint distribution of a proportion of votes for candidate x and a proportion of votes for candidate y is given by
Heights were measured for a random sample of 20 plants grown while being treated with a particular nutrient. The sample mean and sample standard deviation of those height measurements were 39 centimeters and 12 centimeters, respectively.
suppose the lifetime of a particular appliance follows an exponential distribution with a mean of 10 years. what is the
A random sample of 8 recent batches produced the following yields. Conduct a hypothesis test to determine whether the true mean yield has decreased.
How many treatments are there? What is the total sample size? Is there a significant difference at the 5% Level of significance?
Solve the equation for x (by taking the logarithms of both sides): All the other exercises have x on the same side (left) so this one has thrown me.
Describe a situation in which correlation analysis or regression analysis can be (or was) misused to explain cause and effect relationship in a case of fortuitous correlation.
A year ago, Air Force implemented new test for finding which candidates are most probable to become successful pilots. Now they wish to see if implementing pilot predictor test was a good idea. Scores have been standardized to facilitate comparis..
it has been stated that 75 of the population have a smart phone. if you randomly choose 10 people what is the
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