1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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

You might be interested in
Can some one please help me find the answer?
sergiy2304 [10]
516.14mm I think that’s the answer
6 0
3 years ago
Read 2 more answers
Please help ASAP, giving lots of points.
BARSIC [14]
The answers is the last one

6 0
3 years ago
1. Un conjunto de tablero de baloncesto que se vende por $ 79 tiene un descuento del 15%. ¿Cuál es el precio de venta?
GalinKa [24]
El Precio en total sera $67.15 el 15% sera $11.85
3 0
3 years ago
Factor completely. 2x^4+4x^3-30x^2
kramer

Answer:

Step-by-step explanation:

2x⁴ + 4x³ - 30x² = 2x²*(x² + 2x - 15)

x² + 2x - 15

Sum = 2

Product = -15

Factors = 5 ; (-3)

x² + 2x - 15 = x² + 5x - 3x - 3 *5

                  = x(x + 5) - 3(x + 5)

                  = (x + 5)(x - 3)

2x⁴ + 4x³ - 30x² = (2x²) (x + 5)(x - 3)

7 0
3 years ago
Shen borrowed $8000 at a rate of 12%, compounded semiannually. Assuming he makes no payments, how much will he owe after 7 years
Alexandra [31]

Answer:

$18,087.23

Step-by-step explanation:

The future worth of the loan in 7 years compounded semiannually is computed as shown below using the future value formula adjusted for semiannual compounding:

FV=PV*(1+r/2)^n*2

FV is the worth of the loan in 7 years which is unknown

PV is the actual amount of loan which is $8,000

r is the rate of interest of 12%

n is the number of years of the loan which is 7 years

the 2 is to show that interest is computed twice a year

FV=8000*(1+12%/2)^7*2

FV=8000*(1+6%)^14

FV=8000*1.06^14=$18,087.23  

4 0
3 years ago
Other questions:
  • A dump truck weighs 12000 pounds a garbage truck weighs 6.5 tons which car weighs more
    11·2 answers
  • Choose the correct molecular geometry of the phosphorus atom in each of these ions from the list below: A) square plane B) T-sha
    15·1 answer
  • Choose a ratio that forms a proportion with 5/8 A: 50/80 B: 40/80 C: 55/64 D: 50/88
    11·2 answers
  • If 3/4 of an inch on a map is equal to 45 miles , what does 1 inch represent?
    6·1 answer
  • Find the diameter of M. round to nearest hundredth
    5·1 answer
  • Find the arc length of the semicircle. Enter an exact answer in terms of . units​
    12·1 answer
  • Calculate the average rate of change of the function g over the interval-2 A)-4<br> B)-1<br> C)0<br> D)1
    10·1 answer
  • Jesse is a pizza delivery driver. Each day his employer gives him $20 plus $0.50 for every pizza that he delivers.
    6·2 answers
  • If LN=54 and LM=31 find MN
    12·1 answer
  • There are 3,785 milliliters in 1 gallon, and there are 4 quarts in 1 gallon. How many milliliters are in 3 gallons?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!