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zloy xaker [14]
2 years ago
12

A local university produces a study in which it chose 1000 students to participate the study asked each student to write down th

e number of hours spent studying in one week period which element of expire the design is known to be part if this study
a. blinding
b. replication
c. randomization
Mathematics
1 answer:
IgorLugansk [536]2 years ago
6 0
A. Randomization
The selection is based on random selection
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Yahoo creates a test to classify emails as spam or not spam based on the contained words. This test accurately identifies spam (
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Answer and Step-by-step explanation:

The computation is shown below:

Let us assume that

Spam Email be S

And, test spam positive be T

Given that

P(S) = 0.3

P(\frac{T}{S}) = 0.95

P(\frac{T}{S^c}) = 0.05

Now based on the above information, the probabilities are as follows

i. P(Spam Email) is

= P(S)

= 0.3

P(S^c) =  1 - P(S)

= 1 - 0.3

= 0.7

ii. P(\frac{S}{T}) = \frac{P(S\cap\ T}{P(T)}

= \frac{P(\frac{T}{S}) . P(S) }{P(\frac{T}{S}) . P(S) + P(\frac{T}{S^c}) . P(S^c) }

= \frac{0.95 \times 0.3}{0.95 \times 0.3 + 0.05 \times 0.7}

= 0.8906

iii. P(\frac{S}{T^c}) = \frac{P(S\cap\ T^c}{P(T^c)}

= \frac{P(\frac{T^c}{S}) . P(S) }{P(\frac{T^c}{S}) . P(S) + P(\frac{T^c}{S^c}) . P(S^c) }

= \frac{(1 - 0.95)\times 0.3}{ (1 -0.95)0.95 \times 0.3 + (1 - 0.05) \times 0.7}

= 0.0221

We simply applied the above formulas so that the each part could come

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2 years ago
Joel is using the two data points closest to the line to determine the equation of the regression line. What should Joel find fo
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Suppose that 16-ounce bags of chocolate chip cookies are produced with weights that follow a Normal distribution with mean weigh
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I think the answer is C but I’m not sure
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Is 2/5 equal to 0.25 equal
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3 years ago
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Prove the polynomial identity.
Ronch [10]

Answer:

The answer to your question is: 2, 4, 5, 1 , 3

Step-by-step explanation:

The first line is the second

                                             (3x² - 6)² - (3x²)² = 36(1 - x)(1 + 1)

The second line is the forth

                                             9x⁴ - 36x² + 36x² - 9x⁴ = 36(1 - x)(1 + x)

The next line is the fifth

                                             36 - 36x² = 36(1 - x)(1 + x)

The next line is the first

                                             36(1 - x²) = 36(1 - x)(1 + x)

The last line is the third

                                             36(1 - x)(1 + x) = 36(1 - x)(1 + x)

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