4x + 5 - 5x
4 x 12+ 5
48 + 5 - 5
53 - 5
48
Answer: 37
Step-by-step explanation:
Given : Significance level :
Critical value :
margin of error : E= 1 mile per gallon
Population standard deviation: miles per gallon.
We know that when the population standard deviation is known then the formula to find the sample size is given by :
[Round to the next whole number.]
Hence, the required number of automobiles should be used in the test = 37
Step-by-step explanation:
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Answer:
I suppose that's 7.8% of 15.
Step-by-step explanation:
7.8/100=0.078
0.078*15=1.17