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The elevator in a high-rise apartment is presumed to behave like a simple Markov process in the following sense. The elevator is observed each time it stops at or returns to the street floor. Its state on arrival is either empty, 0; partially full, 1; or full, 2. Consecutive observations of the elevator totaling 101 were made. Therefore, 100 transitions were observed. In 35 of them the car was initially empty; 5 of these were followed by full states, 15 by partially full states. In 45 of the transition observations the car was initially partially full; 20 were followed by an empty car and 20 by a partially full car. Of the 20 initially full cars, none was followed by an empty car, and 10 were followed by full cars. Use the obvious fractions to estimate the nine transition probabilities for this (homogeneous) Markov chain. Are these estimators independent random variables? Would estimators based on 100 nonconsecutive transition observations (e.g., observe one transition a day for 100 days) be "better" estimators (i.e., have smaller variance)? Would these nine estimators be independent?
The hypothesis testing process is a very important part of the research process. One of the most common questions is about setting up hypotheses.
A telephone solicitor recently contacted the author to ask for money for a charity in which typical contributions are in the range of $25 to $50.
In carrying out a chi-square test for the independence of variables, what is the procedure for determining the number of degrees of freedom to be used in the test?
You are performing a hypothesis test of a single population mean using a Student's t-distribution. What must you assume about the distribution of the data?
in a partially destroyed laboratory record of an analysis of correlation data the following results are legible
A flat-bottomed hole 6 mm in diameter is drilled to a depth of 24 mm in a diffuse, gray material having an emissivity of 0.8 and a uniform temperature of 1000 K. (a) Determine the radiant power leaving the opening of the cavity.
A company uses the formula C(x) = 0.02x^2 - 3.4x + 150 to model the unit cost in dollars for producing x stabilizer bars. For what number of bars is the unit cost at its minimum?
Conduct the most appropriate hypothesis test using a 0.05 significance level. Construct a 95% confidence interval for the true proportion of automobiles with drive trains that fail.
We want to determine if the proportion of people in the population who believes this is less than 0.75. What is the p-value?
Problem Definition: Midwest Insurance wants to develop a model able to predict sales according to time with the company
in exercises 9.55-9.60 we have given the value obtained for the test statistic z in one mean z-test. we have also
given the following demand schedule for newspapers find the optimal order size if papers cost the newsboy .50 and he
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