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
Daniel [21]
3 years ago
15

Apollo medical supplies produces hypodermic needles. For a particular type of needle, the average length should be 70 mm, and it

is estimated that the standard deviation of the system is 1.25 mm. Apollo conducts quality control by taking a sample of 16 random needles every hour. Below is the mean of 5 hours’ worth of samples. Sample Length (mm) 1 69 2 72 3 71 4 70 5 68 What would be the upper control level with a 99.7% level of confidence?
Mathematics
1 answer:
BartSMP [9]3 years ago
5 0

Answer:

70.94 mm is the upper control level with a 99.7% level of confidence.

Step-by-step explanation:

We are given the following data:

69, 72, 71, 70, 68

Population mean = 70 mm

Population standard deviation = 1.25 mm

We have to find the upper control level with a 99.7% level of confidence.

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{350}{5} = 70

99.7% Confidence interval:

\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.003} = \pm 2.98

70 \pm 2.98(\frac{1.25}{\sqrt{16}} ) = 70 \pm 0.93125 = (69.06875,70.93125) \approx (69.07,70.94)

Thus, 70.94 mm is the upper control level with a 99.7% level of confidence.

You might be interested in
ABCD is a parallelogram.
jolli1 [7]

Answer:

25

Step-by-step explanation:

180-90-65 = 25

Opposite angles are same

7 0
3 years ago
You earn $8.50 per hour. Then you receive a raise to $9.35 per hour. Find the percent increase. Then find your pay per hour if y
netineya [11]
Subtract $8.50 by $9.35
4 0
3 years ago
25 equivalent expressions to 8x+12
-Dominant- [34]
Here are some
1 ) 4 ( x - 3 )
   2 ) 10 x - 2 x - 12
   3 ) 8 x - 4 - 8
8 0
2 years ago
Identify the angle measures of PQRS.
kap26 [50]
The opposite angles of an inscribe quadrilateral are supplementary.

angle P + angle R = 180
6x + 7 + 12x + 11 = 180
18x + 18 = 180
18x = 162
x = 9

Now we will substitute in the value of x to find angle P and R.

angle P = 6(9)+7 = 61
angle R = 12(9)+11 = 119

Now we will find the value of y.

angle Q + angle S = 180
10y + 7 + 3(3y + 7) = 180
10y + 7 + 9y + 21 = 180
19y + 28 = 180
19y = 152
y = 8

Now substitute in the value of y to find angle Q and S.

angle Q = 10(8)+7 = 87
angle S = 3(3*8+7) = 93

Hope this helps :)
7 0
3 years ago
Help please asap!!! thanks :))
Gnoma [55]
I think maybe the answer is probably 7. Hope this helps !!
3 0
2 years ago
Other questions:
  • Use the sum of cubes identity to find the factors of the expression 8x6 + 27y3. Write your answer in the form of the expression
    6·1 answer
  • .77 times 136.9 for dividing decimal worksheet thx!
    14·1 answer
  • Hank has finished 7/9 of his homework. Billy has finished 2/3 of his homework. Who is closer to finishing his homework?
    12·2 answers
  • Experts/ace/geniuses helpp
    9·1 answer
  • What is the constant of proportionality
    13·1 answer
  • What the heck is this?
    9·1 answer
  • Solve equation by using the quadratic formula.<br> 2x2 + 13x = 0
    9·2 answers
  • 10. Which points are on the line that passes through (-4,-3), (20, 15), and (48, 36) ?<br>​
    7·1 answer
  • Find the product.<br><br> (8-3z)(8+3z)
    11·1 answer
  • Nine less than the product of 4 and a number is 23
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!