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Ugo [173]
4 years ago
9

A study by Goldstein et al. (1997) examined the effect of playing video games on the reaction time of elderly individuals. Volun

teers in the experimental group played the puzzle game Tetris five hours a week for five weeks. Control group participants did not play the game. At the end of the study Goldstein et al. rejected the null hypothesis. What does this mean?
Mathematics
1 answer:
sweet-ann [11.9K]4 years ago
6 0

Answer:

Step-by-step explanation:

Hello!

The study hypothesis was that playing videogames improves the reaction time on elderly individuals. If so, then the average reaction time on the elderly that played videogames is less than the average reaction time of elderly that do not play video games.

In the null hypothesis, the researchers usually state the known information or the possibility that the experiment has no effect, in this case, that playing video games doesn't modify the average reaction time in the elderly. If this hypothesis was rejected, this means that playing videogames increases significantly the reflexes in elderly individuals and reduces their reaction time.

I hope it helps!

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Geometry help please!!!
julia-pushkina [17]
Before we begin, let's identify what kind of angles these are and are they related in any way?

These angles are both acute and they are both corresponding angles.
Corresponding angles are equal to each other, and we can use this fact to our advantage.

Since they are equal to each other, we can set the equations of 1 and 2 equal to each other. Like so,

1 = 2
83 - 2x = 92 - 3x

Now, we can solve for X by isolating it on one side.

83 - 2x = 92 - 3x

Add 3x to each side: (This basically moves the X on the right side to the left.)
83 - 2x + 3x = 92 - 3x + 3x
83 + x = 92

Subtract 83 on each side to isolate the X.
83 + x - 83 = 92 - 83 
x = 92 - 83
x = 9

Therefore, X equals 9. To check our work, we can substitute X for 9.
83 - 2(9) = 92 - 3(9)
83 - 18 = 92 - 27
65 = 65  - 
TRUE

So to conclude, Angle 1 is 65 degrees, Angle 2 is 65 degrees, and X equals 9.

Hope I could help you out!
If my answer is incorrect, or I provided an answer you were not looking for, please let me know. However, if my answer is explained well and correct, please consider marking my answer as Brainliest!  :)

Have a good one.
God bless!
7 0
3 years ago
Simplify the expression.<br><br> (−2g5h2)5
vampirchik [111]
I am sure you are trying to type

( - 2 {g}^{5} {h}^{2} {)}^{5}
If that is it, then you should recall the law of exponents which says,

({a}^{m} {)}^{n} = {a}^{mn}
Let us share the exponent for each of them.

( - 2 {g}^{5} {h}^{2} {)}^{5} = ( { - 2)}^{5} ( { {g}^{5}) }^{5} ( { {h}^{2}) }^{5}
We now apply the law,

( - 2 {g}^{5} {h}^{2} {)}^{5} = ( { - 2)}^{5} ( { {g}^{5 \: \times 5}) }^{} ( { {h}^{2 \times 5}) }^{}
We now simplify to obtain,

( - 2 {g}^{5} {h}^{2} {)}^{5} = -32 {g}^{25} {h}^{10}

If that is not the expression let me know so I will know how to help you
4 0
3 years ago
Assessment
Rina8888 [55]
Axis of symmetry for this function will be x=2 because your origin point is always the reference for the line of symmetry. In this case, it as been shifted to the right 2 units giving you x=2. Firstly, the transformation is a horizontal stretch by a factor of 10. Secondly, it is shifted 2 units to the right and finally shifted 7 units down. Remember when a constant is added or subtracted to x in a function, it is shifted the number of u its opposite of the constant. When there is a constant separate from x, such as outside parentheses or absolute value bars, it is shifted up or down the given amount.
7 0
3 years ago
Find the sides on this 30-60-90 triangle
Serga [27]

Answer:

A = 3, B = 5.2

Step-by-step explanation:

i think that is right, i hope this helps.

6 0
3 years ago
Convert 1012 into bainary number system​
rewona [7]
1111110100

Do modulo 2 then floor divide by 2 and repeat


Mark brainliest please
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