The article “Soft Drinks Consumption is Associated with Nonalcoholic Fatty Liver Disease Independentof Metabolic Syndrome in Chinese Population” presents the results of a study of soft drink and smoking habits in a sample of adults. Of 11,805 people who said they consume soft drinks weekly, 2527 said they were smokers. Of 14,985 who said they almost never consume soft drinks, 2503 were smokers. Find a 95% confidence interval for the difference between the proportions of smokers in the two groups.
What will be an ideal response?
The standard deviation for the difference between the means 
If 50 pieces of yarn are sampled from the old batch, then 
The standard deviation for the difference between the means is then 
If 50 pieces of yarn are sampled from the new batch, then 
If 25 pieces of yarn are sampled from each batch, then 
The standard deviation for the difference between the means is then 
Therefore sampling 50 additional pieces from the new batch increases the precision the most.
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Fill in the blank(s) with the appropriate word(s).
What is the true power in a 2A series RL circuit with a 100? resistor?
a. 50W b. 200W c. 400W d. 600W
Two types of fixed metering devices are:
A) Copper and brass. B) Capillary tubes and orifices. C) Pressure reducing and pressure increasing. D) high pressure and low pressure.
The low form of plant life that grows in condenser water is ____________________.
Fill in the blank(s) with the appropriate word(s).