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
antoniya [11.8K]
3 years ago
7

A local mattress manufacturer wants to know if its manufacturing process is in or out of control and has hired you, a statistics

expert in the field, to analyze its process. Specifically, the business has run 20 random samples of size 5 over the past month and has determined the mean of each sample.
a. Determine the estimate of the mean when the process is in control.
b. Assuming the process standard deviation is .50 and the mean of the process is the estimate calculated in part a, determine the Upper Control Limit (UCL) and the Lower Control Limit (LCL) for the manufacturing process.
c. Explain the results to the vice-president of the mattress manufacturer focusing on whether, based on the results, the process is in or out of control.
Sample no. Mean of Sample
1 95.72
2 95.44
3 95.40
4 95.50
5 95.56
6 95.72
7 95.60
8 95.24
9 95.46
10 95.44
11 95.80
12 95.20
13 94.82
14 95.78
15 95.18
16 95.32
17 95.08
18 95.22
19 95.04
20 95.
Mathematics
1 answer:
strojnjashka [21]3 years ago
4 0

Answer:

Answer to question a = 95.4

Answer to question b = UCL = 96.07

LCL = 94.73

Answer to question c = Process is still in control

Step-by-step explanation:

a. The computation of estimate mean is as shown below:-

= 95.4

b. The computation of Upper Control Limit (UCL) and the Lower Control Limit (LCL) for the manufacturing process is shown below:-

= 95.4 + 0.67082

= 96.07

= 95.4 - 0.67082

= 94.73

c. The explanation is shown below:-

From the above calculation we can see that the sample lies between LCL AND UCL that is (94.73 ,96.07) ,

The Process is still in control

You might be interested in
HELP ASAP WILL MARK BRAINIEST!!!!!
Setler [38]
1/4 revolution per foot, not sure about slope. Hope this helps
6 0
3 years ago
1. Many Alpine ski centers base their calculations of revenues and profits on the belief that the average skier ski’s four times
pshichka [43]

Answer:

We cannot infer at the 10% significance level that the assumption of ski centers is wrong

Step-by-step explanation:

The null hypothesis for this question can be stated as  

Null hypothesis H0:  =4  

Alternate hypothesis Ha:  

The test is two tailed

Standard Deviation –  

 = 2

z=(4.84-4)/(2/sqrt(63))

=3.33

Z(0.1/2)=1.645 is less than Z =3.334

Hence, we will reject H0  

Hence, the average growth skier ski’s four times a year is not true  

6 0
3 years ago
Help!!!!! No weird answers pls
Papessa [141]

open the parenthes. and then after that you'll get 27+12x-15. if you simplify that then you'll get 12x+12

7 0
3 years ago
Read 2 more answers
Look at the picture and plzzz help
Bogdan [553]

The answer is the last choice

7 0
3 years ago
Read 2 more answers
Which equation best matches the graph shown below?
Naily [24]

Answer:

y=0.5(x+6)(x+5)

Step-by-step explanation:

Since the parabola goes upwards as it expands from the vertex, the "a" value is definitely positive so the answer must be either the top-left or bottom-right. Next, use the roots to find the final answer. The roots are on the left side of the y-axis which indicates that they are negative. Now you know that the answer is the bottom-right answer because if both roots are negative, then the expressions must include addition to create 0 which is the y-value at the bases.

5 0
3 years ago
Other questions:
  • What's -8+9w+(-23) <br> ????
    7·1 answer
  • I need an answer ASAP.........Fifteen of the students in a math course, which was 92% of the students registered in the course,
    6·1 answer
  • Tony buys a CD that is priced at $13.59. He has a coupon for $1.85 off. He pays with a $20 bill. Which is the best whole number
    13·2 answers
  • Factor completely 9r^2 + 30r+25
    11·1 answer
  • Draw triangle abc where:
    13·1 answer
  • The temperature was 88°F this morning. It dropped 2°F every hour,
    14·1 answer
  • Help with these questions please ‼️
    11·1 answer
  • Select the best answer for the question
    12·1 answer
  • I am solely here to brag!
    8·1 answer
  • PLS HELP ME WITH ANGLES
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!