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raketka [301]
3 years ago
8

Assume that adults have IQ scores that are normally distributed with a mean of 101.3 and a standard deviation 19.9. Find the fir

st quartile Upper Q 1​, which is the IQ score separating the bottom​ 25% from the top​ 75%. (Hint: Draw a​ graph.)

Mathematics
1 answer:
AnnyKZ [126]3 years ago
4 0

Answer:

87.9

Step-by-step explanation:

Use a calculator or table to find the z-score that corresponds to 25%.

P(Z < z) = 0.25

z = -0.675

Now find the value that corresponds to that z score.

z = (x − μ) / σ

-0.675 = (x − 101.3) / 19.9

x = 87.9

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A. <span>∠M is a right angle and MK bisects ∠LMJ.

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</span><span>B. LM = JM = 3 and JK = LK = √17.
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this makes the quadrilateral a kite.


<span>C. MK intersects LJ at its midpoint
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<span>D. The slope of MK is –1 and the slope of LJ is 1.

this only means that MK and LJ are perpendicular, but not whether they bisect each other,


Answer: only B</span>
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