What conditions are necessary in order to use the z-test to test the difference between two population means? Select all the necessary conditions below. A. Each population has a normal distribution with a known standard deviation. B. The samples must be independent. C. The samples are paired. D. The samples must be randomly selected.

Q: Liquid leaked from a damaged tank at a rate of r(t) liters per hour. The rate decreased as time…

A: We need to find lower and upper estimate.

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A: 5. In the given right triangle , the hypotenuse is 41 and the perpendicular length is 40. Apply the…

Q: 5. 20 52

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Q: In the diagram at the left below, PT is tangent to 00 and PN intersects 00 at J. Find the radius of…

A: Draw a perpendicular line PO. Join OT. To find OT=radius. Given PN = PJ + JN= 8+4=12, ON=4 ,PT=12

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A: Given:     sin 28°=x19⇒x=19sin28∘ ⇒x≈8.91995

Q: 2.1 quest 2

A: To Prove- If tn denotes the nth triangular number, prove that in terms of the binomial coefficients,…