Total = 300
Smokers = 234
Non-smokers = 300 - 234 = 66
Percentage of smokers = 66/300 x 100 = 22%
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Answer: 22% of the people smoke.
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Answer:
The scale factor of the drawing is 7/1 or 7 millimeters for every 1 meter (7/1).
Step-by-step explanation:
Answer:
a) The modal class for this case represent the class with the highest frequency
And for this case would be
with the highest frequency 8
b) 
Step-by-step explanation:
Part a
The modal class for this case represent the class with the highest frequency
And for this case would be
with the highest frequency 8
Part b
For this case we need to find the mid point of each interval:
Interval Midpoint Frequency
18-20 19 3
20-22 21 2
22-24 23 7
24-26 25 8
And we can find the sample mean with this formula:

And replacing we got:

Answer:
D
Step-by-step explanation:
Subtract $50 from $62.50
62.50 - 50 = 12.5