It is known that the highest weekly average price for gasoline in California during 2005 was $3.15 per gallon and the lowest wee
1 answer:
Answer:
$0.15
Step-by-step explanation:
To solve this problem, we apply the Range rule for estimating Standard deviation.
By the Range Rule:
Standard Deviation
Highest weekly average price for gasoline= $3.15 per gallon.
Lowest weekly average price for gasoline =$2.56 per gallon.
Therefore:
The standard deviation of the weekly average price for gasoline is approximately $0.15.
NOTE: You divide by 4 not 6.
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<span>Given that Arthur is conducting a study on the preferred study options of students from East County College and that 25% of those surveyed preferred studying abroad. Thus, p = 25% = 0.25 and 1 - 0.25 = 0.75
np = 32(0.25) = 8
n(1 - p) = 32(0.75) = 24
Thus, the sample size is appropriately large.
The margin of error is given by:
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Thus, the margin of error is given by:
Therefore, the statement that holds true is "a<span>s the sample size is appropriately large, the margin of error is ±0.15".</span>