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kozerog [31]
3 years ago
12

The mean number of words per minute (WPM) typed by a speed typist is 119 with a standard deviation of 15 WPM. What is the probab

ility that the sample mean would differ from the population mean by greater than 4.1 WPM if 33 speed typists are randomly selected? Round your answer to four decimal places.
Mathematics
1 answer:
Semmy [17]3 years ago
3 0

Answer:

the probability that the sample mean would differ is 0.1164

Step-by-step explanation:

The computation of the probability is shown below

= 1 - P(Within 4.1 WPM)

= 1 - P( -4.1 ÷ 15÷ √3 <z < 4.1 ÷ 15÷ √3)

= 1 - P(-1.57 < z < 1.57)

= 1 - 0.8836

= 0.1164

Hence, the probability that the sample mean would differ is 0.1164

Therefore the same would be applied and relevant

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Pythagorean theorem to determine if a triangle with sides 2 ft,5ft,4ft is a right triangle
Delvig [45]
a^2 + b^2 = c^2

2^2 + 4^2 = 5^2

4 + 16 = 25

20 = 25

Since 20 = 25 is clearly a false statement, the three side lengths 2 ft, 4 ft, and 5 ft do not form a right triangle.
4 0
3 years ago
Eighty-five more than the square of a number is the same as the square of the quantity that is 17 less than the number. What is
mario62 [17]
We can turn this word problem into the following equation:
x^2 + 85 = (x - 17)^2
  x^2 + 85 = x^2 - 34x + 289
           -85                       -85
_______________________
      x^2 = x^2 - 34x + 204                    
     +34x         +34x
_______________________
 x^2 + 34x = x^2 + 204
-x^2             -x^2
____________________
       34x = 204
Divide 34 on both sides
      x = 6.
The number is 6.
5 0
3 years ago
PLEASE HELP I’LL REWARD BRAINIEST
Anuta_ua [19.1K]

Answer:

Start with y=mx+b since it is perpindicular to the slope of -3/4 the new slope is 3/4. so now we have m=4/3 next we subsitute known values in (0,-1). We multiply 0 by 3 next we have -1=0+b so be has to be -1 so your awnser is

y=4/3-1

4 0
3 years ago
Ms. Ford is buying bundles of virgin hair from She’s Happy Hair that costs $75 per bundle, but $42.50 for shipping. If Ms. Ford
Pani-rosa [81]

Answer: 7 bundles.

Step-by-step explanation:

The cost per bundle is $75.

The cost for shipping is $42.50

She spent $567.50 in total.

The shipping is paid only one time, as all the bundles can be packaged togheter.

Then after paying the shipping, the left spent is:

$567.50 - $42.50 = $525

And each bundle costs $75, then the number of bundles that she bought will be equal to the number of times that we have $75 in $525. This is equal to the quotient between $525 and $75.

N = $525/$75 = 7

She bought 7 bundles

3 0
3 years ago
Evaluate:
Anit [1.1K]

-(-9) - 14 - (6) + 5 + (-8) - 2 - (11) - (-2)

9 - 14 - (6) + 5 + (-8) - 2 - (11) - (-2)

-5  - (6) + 5 + (-8) - 2 - (11) - (-2)

-11+ 5 + (-8) - 2 - (11) - (-2)

-6+ (-8) - 2 - (11) - (-2)

-14 - 2 - (11) - (-2)

-16 - (11) - (-2)

-27+2

-25

Choice A

8 0
3 years ago
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