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An outreach program is tasked with estimating the annual income of a household given its school district, neighborhood crime rate, proximity to clean drinking water, and roof type (there are three types: thatched, tin, or tile). The program only collected roof type information for a (uniformly random) 90% of households in its dataset and wants to impute (that is, ll in a best guess for) the missing roof type values prior to carrying out subsequent analyses. Suggest a reasonable way to impute the missing roof type values in a manner that makes use of the other features collected for each household.
Assume grades in a course follow a normal distribution. The average grade in a class is 75, and the standard deviation is 5 points. A professor takes a sample of 10 people in the class and calculates the average for that class is also 75. IN other wo..
The energy information administration records per capital consumption of energy
Find an expression for the unexplained variation in terms of the sample size n and the standard error of estimate se. Find an expression for the explained variation in terms of the coefficient of determination r 2 and the unexplained variation.
A project manager at System Design Corporation
An insurance company suspects that there is a positive linear relationship between the dollar amount of fire damage in residential fires, and the distance between the residence and the nearest fire station. Data were collected on a random sampl..
Resource-selection analysis compares the distributions of animals relative to the distribution of habitat. If the two don't agree, there is evidence of selection. A survey of 106 moose found that 24 were located in "In burn - interior," 22 in "..
Explain the bias and sampling error
Develop a model for the Total Cost to put on the seminar. Let x represent the number of students who enroll in the seminar - develop a model for the Total Profit if x students enroll in the seminar.
Use these data to test the null hypothesis of no difference in the use of sick days between younger and older adults - What do your results indicate
A service call has just come in, but the type of malfunction is unknown. It is 3.00 P.M. and service technicians usually get off at 5:00 P.M. What is the probability the service technician will have to work overtime to fix the machine?
List the kinds of factors that create the learning effect. Explain how changes in a process, once it is under way, can cause scallops in a learning curve. Name some areas in which learning curves are useful.
1. Is hedging typically used in active portfolio management? 2. Do bond mutual fund managers tend to have more success in outperforming their relevant benchmarks than stock mutual fund managers do with their relevant benchmarks?
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