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Material Type: Assignment; Class: Appl Research Skills Economist; Subject: Economics; University: University of New Hampshire-Main Campus; Term: Unknown 1989;
Typology: Assignments
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Homework Assignment 3 Statistics I
Applied Research Skills for Economists ECON 775
a. What is the probability of obtaining this x or one smaller if the parent
and unknown variance?
b. What is the probability of obtaining this x or one smaller if the parent population has mean μ =110 and a standard deviation of σ =14? What is the probability that x is this small or smaller if the population has mean
b. Is P ( z ≥ 2. 0 )= 0.0228 greater than P ( t ≥ 2. 0 )for all sample sizes? How do you explain this fact?
a. Suppose that a sample of nine observations yields a sample variance of
that x lies between 45 and 55?
b. How would your answers to the above problem change if n = 36?
5.99? What is the probability that s^2 will be more than three times as large as