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A sample of 12 measurements has a mean of 23 and a standard deviation of 2.75. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 23 each. Find the standard deviation of the sample of 14 measurements.
Edna Kropp's gross income for a year included salary, $12,400; commission, $27,750; interest, $440. Her adjustments to income were payments to a retirement plan, $2,000, and a penalty for withdrawing savings early from a time-deposit account, $126..
In a percent change graph of an average teachers annual salary the bars representing successive years are either unchanged or decreasing in size.
This is the question in my assignment. Give an example of a number you could place in for the variable x, and describe the shift from the original graph. Remember to note what your value you are calculating for the variable x.
Statistics: linear and multilinear regressions, The personnel director for a local manufacturing firm has received complaints from the employees in a certain shop regarding what they perceive to be inequities in the annual salary for employees who..
Test car A is traveling at a rate of 146 . Test car B is traveling at a rate of 93 . Which car is moving at the faster rate?
In 2007, a bank was offering 4.39% interest on its online Orange Savings Account, with interest reinvested quarterly. Find the associated exponential model for the value of a $4,000 deposit after t years.
Probability Definition of Continuity. Suppose that f_x is the probability density function (PDF) of a continuous random variable X. Also suppose that f_x is continuous on (a, b)
The circumference of a sphere was measured to be 73000 cm with a possible error of 050000 cm. Use linear approximation to estimate the maximum error in the calculated surface area. Estimate the relative error in the calculated surface area.
The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?
how many trails need to be built? Since it is considered bad luck to live at the end of a trail, can the trails be built so that no house is so situated?
A farmer wants to fence o a rectangular ?eld and then divide the ?eld in half with a fence down the middle (see diagram below). If he can only aord 240 ft. of fencing material, what is the width y which gives the maximum area of the ?eld?
Series convergence - Prove, using the definition, that the following sequence converger
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