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Kazeer [188]
3 years ago
7

Math test!!! please help!!! pick abc or d

Mathematics
2 answers:
Soloha48 [4]3 years ago
4 0

Answer:

b

Step-by-step explanation:

i took the test

solong [7]3 years ago
3 0

Answer:

it b  i use phothomath

Step-by-step explanation:

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A principal believes 50% of her music students reported their practice hours accurately. Based on that assumption, she ran 200 s
Alex17521 [72]

Answer:

C. unlikely

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

A probability is said to be extremely likely if it is 95% or higher, and extremely unlikely if it is 5% or lower. A probabilty higher than 50% and lower than 95% is said to be likely, and higher than 5% and lower than 50% is said to be unlikely.

In this problem, we have that:

\mu = 0.48, \sigma = 0.18

How likely is it that a single survey would return a mean of 30%?

We have to find the pvalue of Z when X = 0.30.

Z = \frac{X - \mu}{\sigma}

Z = \frac{0.30 - 0.48}{0.18}

Z = -1

Z = -1 has a pvalue of 0.1587.

So the correct answer is:

C. unlikely

4 0
3 years ago
WILL GIVE BRAINLIEST!! (Look at photo if confused)
andrey2020 [161]

Answer:

1. B. 9

2. A. 4

3. D. 9 × 9 × 9 × 9

4. C. 6,561

5 0
2 years ago
Read 2 more answers
Which equation represents a line that passes through (-9, -3) and has a slope of -6? - = y-9 = -6(x-3) y + 9 = -6(x + 3) y-3 = -
kupik [55]

Answer:

(y+3)=−6(x+9) ( y + 3 ) = − 6 ( x + 9 )

Step-by-step explanation:

4 0
2 years ago
I need help with this
Svetradugi [14.3K]

Answer:

A, E, and F

Step-by-step explanation:

"Irrational Number. An irrational number is a number that cannot be expressed as a fraction for any integers and. . Irrational numbers have decimal expansions that neither terminate nor become periodic." quoted from mathworld.wolfram.com.

Hope this helps! Have a great day! :)

3 0
3 years ago
PLSSS HELP IF YOU TURLY KNOW THISS
Darya [45]

Answer:

B) 5/6

Step-by-step explanation:

Just count the points from 0 as a ratio of all the total points from 0 to 1.

4 0
2 years ago
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