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Spring CD remains in the horizontal position at all times due to the roller at D. If the spring is unstretched when θ = 0° and the bracket achieves its equilibrium position when θ= 32°, determine the stiffness k of the spring and the horizontal and vertical components of reaction at pin A.
(a) Consider a normal distribution with mean μ = 88. If 2% of the values lie below x = 50, find the standard deviation σ. (b) Consider a normal distribution with standard deviation σ = 15.6. If 10% of the values lie above x = 17.2, find the mean μ.
The mean salary of the nine employees of a small business is $52,000 per year. One employee, whose salary was $68,000, was red. Two new employees, who will each be paid a salary of $40,000, are hired. What is the new mean annual salary of the emp..
Shirley runs a real estate company. She counts the total number of flats that she sells everyday. Let X_t be the total number of flats she sells on day t (t=1,2,...,7), and let X be the total number of flats she sells for the week.
To test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were handed in.
Find the prob. that they get such a family and the boy is the youngest
Is there evidence of difference in median performance between two methods? (Use α = 0.05.)
Which of the following is true about the random variables X, Y, and Z?
a statistics practitioner would like to estimate a population mean to within 40 units with 99 confidence given that the
The following table lists the annual amounts of glass cullet produced by Kimble Glass Works, Inc. Determine the least squares trend equation. Estimate the amount of scrap for the year 2005.
a hypothesis test for a population proportion p is given belowho p 0.25 vs.ha p ne 0.25 ne means not equalfor sample
in order to compare failure rates for two brands of tires a sample of 600 tires of brand a was taken of which 36
What is the probability a person has the disease given that the test result is positive?
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