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
Ray Of Light [21]
3 years ago
14

For any set of n measurements, the fraction included in the interval y − ks to y + ks is at least 1 − 1 k2 . This result is know

n as Tchebysheff's theorem. A personnel manager for a certain industry has records of the number of employees absent per day. The average number absent is 7.5, and the standard deviation is 2.5. Because there are many days with zero, one, or two absent and only a few with more than ten absent, the frequency distribution is highly skewed. The manager wants to publish an interval in which at least 75% of these values lie. Use Tchebysheff's theorem to find such an interval.
Mathematics
1 answer:
djverab [1.8K]3 years ago
6 0

Answer:

The interval [2.5, 12.5]

Step-by-step explanation:

<em>Tchebysheff’s Theorem states that for any distribution of probabilities if k ≥ 1, at least  </em>

100(1-\frac{1}{k ^2 })\%

of the data will lie within k standard deviations of the mean.

We need then to find a k greater or equal than 1 such that

100(1-\frac{1}{k ^2 })\%= 75\%

or the equivalent equation

(1-\frac{1}{k ^2 })= 0.75

Finding the value of k

(1-\frac{1}{k ^2 })=0.75\Rightarrow \frac{1}{k^2}=0.25\Rightarrow k^2=\frac{1}{0.25}\Rightarrow k^2=4\Rightarrow k=2

So, applying Tchebysheff’s Theorem, the manager can assure that the number of employees that can be absent in a given day, lies in the interval

[7.5-2*2.5, 7.5+2*2.5] = [2.5, 12.5]

You might be interested in
Original price: $20 Discount %: 35%
dangina [55]

Answer:

$13 or $7 off

Step-by-step explanation:

20-35%=13

So that means that it is $7 off and it is now $13

4 0
3 years ago
Nzwxecrtvbyvtrcexwzqzwxecrtvbynu 7 1/2÷56 nkjnknlnlk
Elden [556K]

Answer:

0.1

Step-by-step explanation:

0.13392857142857142857142857142857

8 0
2 years ago
HALP ME PLZZ ASAP NO LINKS
s2008m [1.1K]

Answer:

Step-by-step explanation:

3 0
2 years ago
What are three powers that have values greater than 500 and less than 550
igomit [66]

Solution:

The three powers whose value is greater than 500 and less than 550 can be find by following procedure.

We will solve this problem by Hit and trial method by finding the squares, cubes, fourth power, Fifth Power,...etc. of different natural numbers.

23²= 529

8³ = 8 × 8 × 8 =512

2^8=512

The three powers are →→→Eighth power of 2, Square of 23, and Cube of 8.

8 0
3 years ago
Read 2 more answers
emergency Alejandro has gone to school 5 Over 7 of the last 35 days. Which expression can be used to determine the number of day
Yakvenalex [24]

Answer:

245 days.

Step-by-step explanation:

Hope this helps.

8 0
3 years ago
Read 2 more answers
Other questions:
  • What is an dividend in a math equation?
    6·1 answer
  • Gloria has 2 5/8 ounces of perfume, If she uses one third of it, how much will she have left?
    6·1 answer
  • There are 412 basketball fans who plan to go to a game. How many buses will be needed, given that each bus can hold 49 fans?
    7·1 answer
  • On a Saturday a library check out 66 books and if 18 of the books were fiction what is the ratio of nonfiction books to fiction
    8·2 answers
  • I need this answer QUICKKKK tell me with an explanation
    15·1 answer
  • Please help photo attached
    10·1 answer
  • Jim, Dora, Ada, and Kim together placed a total of 60 cupcakes on a tray. Jim placed 0.45 of the cupcakes, Dora placed 10 of the
    10·1 answer
  • ILL MARK AS BRAINLIEST
    10·1 answer
  • The product of three-fourths of a number and 7 is one-half of 672.​
    15·1 answer
  • State the converse<br><br> Please helps asap
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!