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sergejj [24]
3 years ago
7

A researcher conducts a hypothesis test to evaluate the effect of a treatment that is expected to increase scores. the hypothesi

s test produces a z-score of z = 2.27. if the researcher is using a one-tailed test, what is the correct statistical decision?
Mathematics
1 answer:
lakkis [162]3 years ago
6 0
AZ tech made to EZ tech. In other words, a z-score.
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Define a function f on a set of real numbers as follows: f(x) = 3x − 1 x , for each real number x ≠ 0 Prove that f is one-to-one
dalvyx [7]

Answer with Step-by-step explanation:

We are given that

f(x)=\frac{3x-1}{x}

For each real number x\neq 0

To prove that f is one -to-one.

Proof:Let x_1 and x_2 be any nonzero real numbers such that

f(x_1)=f(x_2)

By using the definition of f to rewrite the left hand side of this equation

f(x_1)=\frac{3x_1-1}{x_1}

Then, by using the definition of f to rewrite the right hand side of this equation  of f(x_1)=f(x_2)

f(x_2)=\frac{3x_2-1}{x_2}

Equating the expression then we get

\frac{3x_1-1}{x_1}=\frac{3x_2-1}{x_2}

3x_1x_2-x_2=3x_2x_1-x_1

3x_1x_2-3x_1x_2+x_1=x_2

x_1=x_2

Therefore, f is one-to-one.

6 0
3 years ago
4 girls and 2 boys are working on an art project they have four square pieces of felt if each person gets an equal share of the
maksim [4K]

(4 pieces) / (6 kids)  =  (4/6) (pieces/kids)  =  2/3 piece/kid

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3 years ago
Please help also worth 10 points
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The answer is A- 5D/y
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3 years ago
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NEED ASAP!!!!<br><br> Find the GCF of 72 60 120. show all work!
kari74 [83]
Answer: 12


The factors of 60 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

The factors of 120 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120

Then the greatest common factor is 12
7 0
3 years ago
Need help. Sorry if the pic quality is bad…
oee [108]
Your answer should be open circles between 10 and 12
4 0
2 years ago
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