Estimate of the pooled standard
The sample standard deviations for two independent samples of size 20 each are 12 and 15. What is the estimate of the pooled standard deviation? Give your answer to 2 decimal places.
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A worker is dragging a box m = 63 up a ramp using a ropen.the ramp makes an angle of 35 above the horizantal the rope is parallel to the ramp and has tension 460.the coefficient of kinetic friction between the block and the ramp is .21.find accerl
A 2.0µF capacitor and a 4.0µF capacitor are connected in series across 1000 V. The charged capacitors are then disconnected from the source and connected to each other with terminals of like sign together. Find the charge on each capac
A two independent sample test for difference of population means is based on samples of size 25 and 28. What is the degrees of freedom for the corresponding t-distribution?
Consider light that is refracted by a prism shaped like an equilateral triangle. The incident ray is parallel with the prism's base. What is the total deflection of the ray, given that the index of refraction of the prism material is 1.50 ?
Neglect heat transfer and potential energy changes. Find: a) the mass flow rate at the exit (kg/s), b) the exit velocity (m/s) and c) the exit flow area (cm2).
The coefficient of kinetic friction between the box and the floor is µk = 0.47. If the system is set moving at v = 10.0 m/s with the block in front of the box, how long does it take for the system to come to rest?
Two independent samples of size 20 each are taken to test for a difference in the corresponding population means. The sample means differ by 5, and the pooled variance is 15. What is the value of the test statistic? Give your answer to four decima
The value of the test statistic for testing if one population mean is larger than the other, based on samples of size 24 and 19, is 2.45. What is the p-value for the test? Give your answer to 4 decimal places.
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