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Strike441 [17]
3 years ago
8

On each trial of an experiment, a subject is presented with a constant soft noise, which is interrupted at some unpredictable ti

me by a noticeably louder sound. The time it takes for the subject to react to this louder sound is recorded. The following list contains the reaction times (in milliseconds) for the trials of this experiment: 296, 311, 202, 217, 231, 171, 241, 164, 257, 269, 175, 273, 285, 226, 261 Find 25th and 80th percentiles for these reaction times.
Mathematics
1 answer:
Julli [10]3 years ago
6 0

Answer:

25th percentile = 202

80th percentile = 285

Step-by-step explanation:

Rearranging the values in increasing order

164

171

175

202

217

226

231

241

257

261

269

273

285

296

311

N = total number of variables = 15.

25th percentile = [(N + 1)/4]th variable = (15 + 1)/4 = 4th variable.

So, the 25th percentile = 4th variable = 202.

80th percentile = 0.8(N + 1) th variable = 0.8 × (15 + 1) = 12.8th variable = 13th variable = 285

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A square has a perimeter of 36x - 12. Which expression represents one side of the<br> square?
valina [46]

Answer:

9x - 3

Step-by-step explanation:

Hello!

A square has 4 sides.

We can factor out 4 from the expression to find the value of one side.

Factor:

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  • 4(9x) - 4(3)
  • 4(9x - 3)

This means that each side of the square is 9x - 3 units long.

6 0
1 year ago
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stepladder [879]

Answer:

Answer;


-38 %

Step-by-step explanation:

Explanation;


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7 0
3 years ago
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Find coordinates of point c
BaLLatris [955]
Ans n solution can refer in the picture

4 0
3 years ago
Evaluate y/2x-z x=4y=3and z=2
Gwar [14]
First you plug in the missing values
y=3 x=4 z=2
3÷2×4-2
than you solve
the answer is 4
5 0
3 years ago
HELPPPP<br><br> If y=4, 3y+6=7(2y-3)
Step2247 [10]

Answer:

i think your question is missing something??

Step-by-step explanation:

3(4) + 6 = 7 (2(4)-3)

12 + 6 = 7 (8-3)

18 = 7 (5)

18 = 35?

8 0
3 years ago
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