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gizmo_the_mogwai [7]
3 years ago
13

Please help this is on Prepworks

Mathematics
1 answer:
Olenka [21]3 years ago
8 0

Answer:

D

Step-by-step explanation:

I hope it's the correct one

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The principal of a large high school wants to know if students spend more than 1 hour doing homework per night, on average. To i
MrRissso [65]

Answer:

If we define the random variable X ="time spend by the students doign homework"

And we want to tes t is students spend more than 1 hour doing homework per night, on average (alternative hypothesis), so then the system of hypothesis for this case are:

Null hypothesis: \mu \leq 1

Alternative hypothesis: \mu >1

And they wnat to use a sample size of n = 100 and a significance level of 0.05

Step-by-step explanation:

Previous concepts

A hypothesis is defined as "a speculation or theory based on insufficient evidence that lends itself to further testing and experimentation. With further testing, a hypothesis can usually be proven true or false".  

The null hypothesis is defined as "a hypothesis that says there is no statistical significance between the two variables in the hypothesis. It is the hypothesis that the researcher is trying to disprove".

The alternative hypothesis is "just the inverse, or opposite, of the null hypothesis. It is the hypothesis that researcher is trying to prove".

Solution to the problem

If we define the random variable X ="time spend by the students doign homework"

And we want to tes t is students spend more than 1 hour doing homework per night, on average (alternative hypothesis), so then the system of hypothesis for this case are:

Null hypothesis: \mu \leq 1

Alternative hypothesis: \mu >1

And they wnat to use a sample size of n = 100 and a significance level of 0.05

7 0
3 years ago
5x + 6(x - 2) - 8 (x - 3)
Alex Ar [27]

Answer:

The value of x=-4. The figure is also attached below.

Step-by-step explanation:

Considering the expression

5x + 6(x - 2) - 8 (x - 3)

If we have to find the vale of x, then

5x + 6(x - 2) - 8 (x - 3)=0

5x+6x-12-8\left(x-3\right)=0

5x+6x-12-8x+24=0

3x+12=0

\mathrm{Subtract\:}12\mathrm{\:from\:both\:sides}

3x+12-12=0-12

3x=-12

\mathrm{Divide\:both\:sides\:by\:}3

\frac{3x}{3}=\frac{-12}{3}

x=-4

Therefore, the value of x=-4. The figure is also attached below.

Keywords: equation

Learn more about equation solution from brainly.com/question/13678520

#learnwithBrainly

5 0
4 years ago
Given the expression (8 + 6i) − (−2 + 7i), perform the indicated operation and write the answer in the form a + bi
Oliga [24]
We can distribute the negative to get 8 + 6i + 2 - 7i, and we can simplify that to get 10 - i.
---
Hope this helps!
6 0
3 years ago
Match each addition operation to the correct sum. 131.87 -23.24
konstantin123 [22]

Answer:

131.87-23.24=108.63

Step-by-step explanation:

To solve this problem, let's line up the problem. To make it easier, we can start by ignoring the decimals.

                                             13187

                                            - 2324

                                           ______

                                             10863

And then, since there were decimals in the first place, we have to add them back in.

                                            10863→108.63

6 0
3 years ago
Round 6.14 to the nearest tenth <br> (this is 5th grade math)
Liula [17]

Answer:

<h2>6.14 rounded to the nearest tenth is 6.1.</h2><h2></h2><h2>I hope it helps.</h2><h2>Have a great day.</h2>

6 0
4 years ago
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