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miv72 [106K]
3 years ago
5

Helppppppp................

Mathematics
1 answer:
GarryVolchara [31]3 years ago
5 0
16 hope this helps you
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The answer is C let me know if it was wrong but it should be correct :)
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The scores on an achievement test are normaly distributed with mean µ = 100 and standard deviation σ = 100. What should the scor
ser-zykov [4K]

Answer:

the student should score atleast 229 to be among the top 10%.

Step-by-step explanation:

in terms of the normal distribution, and if the table that you're using calculates the area of the normal distribution from the mean to a point x, only then what we are actually finding the value 'x' at which the z-score is at 40% (the rest 50% is already skipped by the table)

P(0.4) = \dfrac{x - \mu}{\sigma}

after finding the the value at this z-score, we can find the value of x at which the score is in the top 10% range.

we can find the z-score either using a normal distribution table or calculator. (but be sure what area is it calculating)

looking at the table the closest value we can find is, 0.4015 at z = 1.29 ((it is above 40% because we want to be in the top 10% range)

P(0.4015) = \dfrac{x - 100}{100}

1.29 = \dfrac{x - 100}{100}

x = 1.29(100) + 100

x = 229

the student should score atleast 229 to be among the top 10%.

7 0
3 years ago
Help me with this please!!!!
katen-ka-za [31]

Answer:

Y=2

Step-by-step explanation:

On the Y axis you go up two and yeah that's about it

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The coldest day in ohio clocked in at 40 below zero. In one day though the temperature changed to 20 below zero How much tempera
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Select the correct answer.
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