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
zheka24 [161]
3 years ago
14

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
1 answer:
stira [4]3 years ago
4 0
The mean of the answer is 20.5 because you add all of the number together and divide by 6 because there's 6 numbers. 
I'm sorry, but I don't know how to do the standard deviation... 
Hope this helped!
You might be interested in
Margo brought 7 pens from a book store some pens cost $3.00 EACH and the rest cost $4.00 . If she paid a total of 23.00 for the
Montano1993 [528]

Answer:

5

Step-by-step explanation:

Margo bought 7 pens for $23.

Some pens are $3 and some $4.

We need to find how many $3 pens she bought.

Let the number of $3 pens be represented by p and let the number of $3 pens be represented by r. So:

p = $3  and r = $4

Now we know 7 pens were purchased so is we add the number of $3 pens purchased to the number of $4 pens purchased, we will get 7.

p + r = 7

We know that the total cost of the pens is $23 so that equation would be found by takign the $3 pen multiplied by the number of $3 pens purchsed added to the $4 pen multiplied by the number of $4 pens purchsed, which equals $23.

$3p + $4r = $23

Now we have 2 equations and 2 unknowns.

p + r = 7

$3p + $4r = $23

Let's solve for r in the first equation.

p + r = 7     Subtract p from both sides.

p - p + r = 7 - p   The p on the left cancels.

r = 7 - p

Now that we know r, we can substitute it into the second equation and solve for p.

$3p + $4r = $23

3p + 4( 7 - p) = 23       Multiply it out.

3p + 4*7 - 4*p = $23

3p + 28 - 4p = 23      Combine like terms.

3p  - 4p + 28 = 23

- 1p + 28 = 23       Subtract 28 from both sides.

- p + 28 - 28 = 23 - 28  

- p = - 5   Divide each side by -1

- p/- 1 = - 5/ - 1       The negative cancels on each side.

p = 5

We can see Margo bought 5 $3 pens.

For fun, let's solve for how many $4 pens she bought. We know p, so we plug it in the first equation and solve for r.

p + r = 7

5 + r = 7  Subtract 5 from each side

5 - 5 + r = 7 - 5

r = 7 - 5

r = 2

So Margo bought 5 $3 pens and 2 $4 pens!

8 0
2 years ago
Simplify 3xy + x 2 - 4xy + 2xupper2y​
densk [106]
The answer is X^2-xy+2x^2y sorry if I am wrong
6 0
2 years ago
When theres two negative nubers?are u suppose to add
Nina [5.8K]

Answer:

no

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
0.12 times 0.08 divided by 2.40​
blagie [28]

Answer:

Step-by-step explanation:

515615151

5 0
3 years ago
Read 2 more answers
888 divided by 8 and<br>574 divided by 7<br>​
Reil [10]

Answer:

111 & 82

Step-by-step explanation:

888/8=111

574/7=82

5 0
2 years ago
Read 2 more answers
Other questions:
  • What is 6 2/3 x 2 1/2 if you answer you will get 35 poinst
    14·1 answer
  • A square picture frame measures 36 inches on each side. The actual wood trim is 2 inches wide. The photograph in the frame is su
    12·2 answers
  • When sampled, 95 out of 500 people said they were vegetarians. If the sample was taken from a population of 31,000 people, which
    7·2 answers
  • What is the value of X?
    9·1 answer
  • 50 PTS Please do not steal or I will report
    6·1 answer
  • Pls help me with thissssss
    15·2 answers
  • The cost of 5 scarves is $61.25. What is the unit price?
    14·2 answers
  • 2/6 = 1/2 1/3 <br> which one is the answer
    10·1 answer
  • What is the coordinate of point A?
    13·2 answers
  • I need urgent help and maybe please explain how to do it? I will appreciate it
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!