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Flauer [41]
3 years ago
9

On the last math test in Decker's class, 17 out of 25 students scored an 80 or higher. Which

Mathematics
1 answer:
kirza4 [7]3 years ago
3 0
Answer: 68%

Reasoning: To find the experimental probability, we divide the number of students that scored an 80 or higher by the total number of students, so 17/25

17/25 = 0.68 x 100 = 68%
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Semenov [28]

Answer:

8/5 < x< 12/5

Step-by-step explanation:

(2 - x)^2 < 4/25

Take the square root of each side

sqrt((2 - x)^2)  <±sqrt( 4/25)

Make two equations

2-x < 2/5    2-x > -2/5

Subtract 2 from each side

2-x-2 < 2/5 -2          2-x-2  > -2/5-2

-x < 2/5 -  10/5             -x > -2/5  - 10/5

-x < -8/5                         -x > -12/5

Multiply by -1, remembering to flip the inequality

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8/5 < x< 12/5

5 0
3 years ago
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If an experimenter sets equal to .01, then she is defining a "statistically rare" event as an event occurring more than one time
Fynjy0 [20]

Answer:

The correct answer is an event occurring one or fewer times in 100 times if the null hypothesis is true.

Step-by-step explanation:

For a statistically rare event, its probability is relatively small and the event is very unlikely to occur.  Therefore, if an experimental sets equal to 0.01 which is statistically rare, then we can interpret this mathematically as:

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In addition, statistically, null hypothesis signifies no major difference between the specified parameters, and any obvious difference that might occur as a result of experimental error. Thus, it can be concluded that the event is occurring one or fewer times in 100 times if the null hypothesis is true.

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andriy [413]

Answer:

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Answer:

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Step-by-step explanation:

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