Reduce all answers to their lowest terms 20/27 / 10/9
1 answer:
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Answer:
(12.1409, 14.0591
Step-by-step explanation:
Given that Tensile strength tests were performed on two different grades of aluminum spars used in manufacturing the wing of a commercial transport aircraft. From past experience with the spar manufacturing process and the testing procedure, the standard deviations of tensile strengths are assumed to be known.
Group Group One Group Two
Mean 87.600 74.500
SD 1.000 1.500
SEM 0.316 0.433
N 10 12
The mean of Group One minus Group Two equals 13.100
standard error of difference = 0.556
90% confidence interval of this difference:
t = 23.5520
df = 20
Note: Consider all the numeric values are in the fraction form. Like ,
etc.
Given:
A recipe calls for cup of brown sugar for every
cup of white sugar.
To find:
The number of cups of brown sugar that are required for every cup of white sugar.
Solution:
We know that,
Required brown sugar for cup of white sugar =
cup
Using this, we get
Required brown sugar for 1 cup of white sugar = cup
cup
cup
So, cup of brown sugar is required for every cup of white sugar.
Therefore, the correct option is B.