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
san4es73 [151]
3 years ago
15

The manager of a warehouse would like to know how many errors are made when a product’s serial number is read by a bar-code read

er. Six samples are collected of the number of scanning errors: 36, 14, 21, 39, 11, and 2 errors, per 1,000 scans each.
What is the mean and standard deviation for these six samples?
Mathematics
2 answers:
solmaris [256]3 years ago
6 0

Mean: 20.5

Standard Deviation: 11.5

The mean is the total of the numbers divided by the amount of numbers. So, add 36 + 14 + 21 + 39 + 11 + 2 to get 123. Now, divide 123 by 6 to find that the mean is 20.5.

The standard deviation is the mean of the distances from the numbers to the mean. So, find the distance from the mean for each number. You get 15.5, 6.5, 0.5, 18.5, 9.5, and 18.5. Find the mean of these distances. Start by adding them together to get 69, then divide that by 6 to get a standard deviation of 11.5.

stich3 [128]3 years ago
5 0

Answer with Step-by-step explanation:

Six samples are collected of the number of scanning errors: 36, 14, 21, 39, 11, and 2 errors

Mean=(Sum of all observations)/(Total number of observations)

        =(36+14+21+39+11+2)/6

        = 123/6

        = 20.5

Standard deviation is the square root of mean of squares of deviation around mean

Deviation around mean:

36-20.5, 14-20.5, 21-20.5, 39-20.5, 11-20.5, and 2-20.5

15.5,-6.5,0.5,18.5,-9.5 and -18.5

Square of deviations:

240.25,42.25,0.25,342.25,90.25 and 342.25

Mean of square of deviations

=(240.25+42.25+0.25+342.25+90.25+342.25)/6

=176.25

square root of mean of deviations= \sqrt{176.25}=13.28

Hence, Standard deviation=13.28

and Mean=20.5

You might be interested in
If (5, 4) and (7,2) are the endpoints of a diameter of a circle, what is the equation of the circle?
STatiana [176]

Answer:

  (x -6)^2 +(y -3)^2 = 2

Step-by-step explanation:

The midpoint (C) is the center of the circle:

  C = ((5, 4) +(7, 2))/2 = ((5+7)/2, (4+2)/2) = (6, 3)

A circle with center (h, k) that goes through point (a, b) can be written as ...

  (x -h)^2 +(y -k) ^2 = (a -h)^2 +(b -k)^2

Using the values for this problem, we get ...

  (x -6)^2 +(y -3)^2 = (5 -6)^2 +(4 -3)^2

  (x -6)^2 +(y -3)^2 = 2

8 0
3 years ago
Read 2 more answers
What is the value of x in the equation 8 + x = 3?<br><br> A. −5<br> B. 5<br> C. 11<br> D. 24
zlopas [31]

Answer:

I think it's A

I hope this helps

3 0
3 years ago
Read 2 more answers
Point T is located at (6, –2) and point S is located at (1, 13). What are the coordinates of the point that is 4/5 of the way fr
Darya [45]

Answer:

(2, 10)

Step-by-step explanation:

Making the points on a graph and creating a line between them, you can see the equation to connect the two points is -3x + 16. Then, because the points are 5 units apart horizontally, go to the point that is 4 units left of point T (1/4 of the way between T and S) and that is your point: (2, 10)

I apologize if this is incorrect :)

7 0
3 years ago
Select the procedure that can be used to show the converse of the
Vera_Pavlovna [14]

Answer:

The correct option is C

Step-by-step explanation:

I attached an image that forms the complete question.

The converse Pythagorean theorem states that, "If the square of the longest side of a triangle is equal to the square of the other two sides, then the triangle is a right triangle."

That is if c is the longest side of a triangle and then a and b are the other sides, then if,

c² = a² + b², the triangle is a right triangle.

Looking at all the options, option C fits the theorem well. Because

3² + 4² = 5² implies the triangle is a right triangle and the converse theorem is established.

The option D also looks close, but it's not correct because you can just draw any two sides and put the right angle in between them. The longest is always the part of the triangle that is opposite to the right angle, 90°. If for instance, you draw 3 and 5 then put the right angle in between them, 4 will take the position of the longest side which is wrong.

Therefore, the correct option is c.

7 0
3 years ago
A line representing Car B would have a parallel slope if:
Lerok [7]

Answer:

you add an image

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • What is 1.16 as afraction
    8·2 answers
  • You will get 25 points (06.01) 34 + 3 ⋅ 5 = ____. (Input whole numbers only.) Numerical Answers Expected!
    6·1 answer
  • Solve 5x + 4/y =7 and 4x + x/y =5 simultaneously.​
    5·1 answer
  • &lt;1 and &lt;2 form a linear pair. If m&lt;1= 4m&lt;2, find the measure of each of the two angles.
    11·1 answer
  • Anyone help with this question please..
    12·2 answers
  • Help!! I have exam in 10 minutes
    13·1 answer
  • You are responsible to provide tennis balls for a tournament. You know that a ball bounces like new when it is dropped and it bo
    9·1 answer
  • Find the total cost to the nearest $115 tablet, 35% markup
    7·2 answers
  • 12. Find the area of shaded portion in<br>D 11 cm<br>C С<br>13.5 cm<br>A<br>B<br>15 cm​
    15·2 answers
  • The median of the eight marks 9, 6, 2, 4, 7, 5, 1, 8 is​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!