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Degger [83]
3 years ago
15

PLEASE ANSWER THIS IS THE THIRD TIME IVE POSTED THIS

Mathematics
1 answer:
zhannawk [14.2K]3 years ago
7 0
I believe the answer is:

1 13889/25000

Give me a min if this one is wrong. "Thank" if i got it right
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Two processes in a manufacturing line are performed manually: operation A and operation B. A random sample of 50 different assem
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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

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