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
Alexandra [31]
3 years ago
6

Two processes in a manufacturing line are performed manually: operation A and operation B. A random sample of 50 different assem

blies using operation A shows that the sample average time per assembly is 8.05 minutes, with a population standard deviation of 1.36 minutes. A random sample of 38 different assemblies using operation B shows that the sample average time per assembly is 7.26 minutes, with a population standard deviation of 1.06 minutes.
Required:
For α = 0.10, is there enough evidence in these samples to declare that operation A takes significantly longer to perform than operation B?
Mathematics
1 answer:
MArishka [77]3 years ago
4 0

Answer:

3.06

Step-by-step explanation:

The correct answer is - 3.06

Reason -

For sample A :

mean, \bar{x_{1} } = 8.05          

Standard deviation, \sigma_{1} = 1.36          

Size, n_{1} = 50          

                 

For sample B :

mean, \bar{x_{2} } = 7.26          

Standard deviation, \sigma_{2} = 1.06          

Size, n_{2} = 38

Now,

\bar{x_{1} } - \bar{x_{2} }  = 8.05 - 7.26 = 0.79

Standard deviation error, SE = √(\sigma_{1}²/n_{1} + \sigma_{2}²/n_{2})  = 0.2580

Now,

Z-statistic = (\bar{x_{1} } - \bar{x_{2} } )/ SE

                = 0.79/0.2580

                = 3.06

⇒Z-statistic = 3.06

You might be interested in
LeeAnn is making a table cloth for their dinning table. The table has a diameter of 42 inches. What is the approximate area of t
kiruha [24]

Answer:1384.74 square inches

Step-by-step explanation:

Diameter=42 inches

Radius=42/2

Radius=21 inches

π=3.14

area of circle=π x radius x radius

Area of circle=3.14 x 21 x 21

Area of circle=1384.74 square inches

8 0
3 years ago
What is the sum of an even number plus an odd number?\
Grace [21]

Answer:

both

Step-by-step explanation:

The sum of an even number of odd numbers is even, while the sum of an odd number of odd numbers is odd.

7 0
3 years ago
Why was one trinomial jealous of the other trinomial?
earnstyle [38]

Answer: Seven ate Nine

Step-by-step explanation:

7 0
3 years ago
MATH GRAPH HELP MEEE
Ymorist [56]

The graph gives no reason to expect that y=0 is excluded, so we conclude the range is ...

... y ≥ 0

3 0
3 years ago
Read 2 more answers
Name the segment that is parallel to the
disa [49]

Answer:

13 is the answer (GE) i hope this helped

8 0
3 years ago
Other questions:
  • I have another question as well!
    11·1 answer
  • NEED HELP QUCKILY PLZ HURRY
    13·2 answers
  • (20 POINTS) What is the area of this house?
    15·2 answers
  • I need help please?!!!!
    12·2 answers
  • Which expression is equivalent to 9+8 xn?<br> 0 72n<br> O 9 + 8n<br> 17 xn<br> 0 9x (8 + n)
    14·1 answer
  • PLEASE HELP!!!fast!!!!!!
    14·2 answers
  • 4 inches = ? centimeters
    11·2 answers
  • I need the answer asap and the demonstration please
    15·2 answers
  • What are the common factors of 16 and 24?
    14·1 answer
  • Which algebraic expression represents the following: the sum of four times a number and six? (1 point) 4x + 6
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!