Your answer in the comments please
Answer: variable is distributed normally, then approximately two-thirds of the population will within plus or minus one standard deviation of the mean
Step-by-step explanation:
The standard deviation is calculated as the square root of variance by determining each data point's deviation relative to the mean. If the data points are further from the mean, there is a higher deviation within the data set; thus, the more spread out the data, the higher the standard deviation.
Probably dark and cool, and dry.
420 miles/ 12 gallons= 35 miles per gallon
Final answer: 35 miles per gallon
