The article “Differences in Susceptibilities of Different Cell Lines to Bilirubin Damage” reports an investigation into the toxicity of bilirubin on several cell lines. Ten sets of human liver cells and 10 sets of mouse fibroblast cells were placed into solutions of bilirubin in albumin with a 1.4 bilirubin/albumin molar ratio for 24 hours. In the 10 sets of human liver cells, the average percentage of cells surviving was 53.9 with a standard deviation of 10.7. In the 10 sets of mouse fibroblast cells, the average percentage of cells surviving was 73.1 with a standard deviation of 9.1. Find a 98% confidence interval for the difference in survival percentages between the two cell lines.
What will be an ideal response?
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The pressure regulator on a fuel tank _____.
a. prevents gas from backing up into the tank b. relieves excess internal pressure to keep the tank from exploding c. allows the operator to increase the working pressure in order to work faster d. reduces the high pressure in the cylinder to the lower working pressures required for cutting or welding
One purpose of LEED is to stimulate green competition
Indicate whether the statement is true or false
To change a logic gate to its alternate representation, a simple three-step process is followed
Indicate whether the statement is true or false
What device is designed to open and disconnect a circuit in the event of excessive current?
A. fuse B. power supply C. wire D. potentiometer