3 years ago

Can someone plz answer this?

1 answer:

3 0

Q7. When x is a factor of 2 smaller, y is a factor of 2 larger. (That is what inverse variation means.) y = 2*3.
C) y = 6

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Another way to look at is that "inverse variation" means the product of x and y is a constant. Here, that constant is (3)·(-8) = -24. Then when x=-4, y=-24/-4 = 6.

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GuDViN [60]

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Given : Sample size : $n=16$ , which is a small sample (, 30) so we use t-test.

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$\overline{x}\pm t_{n-1,\alpha/2}\dfrac{\sigma}{\sqrt{n}}\\\\=645\pm(2.131)\dfrac{31}{\sqrt{16}}\\\\\approx645\pm16.52\\\\=(645-16.52,\ 645+16.52)\\\\=(628.48,\ 661.52)$

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