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3 years ago

Classify the hypothesis test as two-tailed, left-tailed, or right-tailed.

Mathematics

1 answer:

34kurt3 years ago

6 0

Answer:

C: left tailed

Step-by-step explanation:

In two tailed hypothesis, the alternative hypothesis is when mean can either be lesser or greater than the given value. Usually uses the symbol ≠.

In right tailed, the alternative hypothesis is when the mean is greater than the given value.

In left tailed, the alternative hypothesis is when the mean is lesser than the given value.

In this question, the hypothesis test to be performed is to determine if the average amount of time spent watching television per week has decreased from the given value of 21.6 hours.

Thus, it is left tailed test.

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If the circumference of a circle is 36π, what is the length of a radius of the circle?

m_a_m_a [10]

Answer:

The answer is 6 (A)

Step-by-step explanation:

The exact answer is 5.73, but I think in the question they are rounding to the nearest whole number, so the rounded answer is 6.

My work:

C = 2πr

r = C

2π = 36

2·π = 5.72958

8 0

3 years ago

HELP FAST!!!!

Natasha2012 [34]

$x-3\leq-7\ \ |+3\\x\leq-4\to A=\left(-\infty;-4\right>\\\\x-3\geq1\ \ \ |+3\\x\geq4\to B=\left\ \cup\ \left$

7 0

3 years ago

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wolverine [178]

(32/8)-18+4
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5 0

3 years ago

Professor Simpson is interested if time spent studying is affected by the color of a room. She randomly assigns her students int

Pachacha [2.7K]

Answer:

IV: colour of the room

DV: The number of minutes each group spends studying

Step-by-step explanation:

IV(Independent Variable) : is what is changed in the experiment and the colour of the room is being changed.

DV(Dependent Variable) : is what is measured in the experiment and the number of minutes in spent on studying is measured.

3 0

3 years ago

Graphing f(x)=(x+2)^2-3 in vertex form

USPshnik [31]

Answer:

Step-by-step explanation:

This is a parabola shaped like a U.

The minimum value is at (-2, -3).

Find the zeroes:

(x + 2)^2 = 3

Find the zeroes:

x + 2 = +/- √3

x = +/-√3 - 2

x = -0.27, -3.73.

So the graph cuts the x axis at (-0.27, 0) and (-3.73, 0)

when x = -4 , f(x) = 1 and when x = 1, f(x) = 6.

So you can now draw the curve through these 5 points and it will be shaped like a U, symetrical about the line x = -2

5 0

3 years ago