A random sample of 150 students attending Iowa State University has a mean age of 20.3 years and a standard deviation of 1.2 years, while a random sample of 110 students attending the University of Iowa has a mean age of 21.1 years and a standard deviation of 1.5 years. Discuss whether we can conclude that the average age of students at the two universities are not the same. (Calculations not required.)
What will be an ideal response?
Cannot determine without population data.
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Is it true that algae exist in water and soil?
Indicate by YES (Y) or NO (N).
Which of the following phenomenon is commonly used in industry to sense very small changes in the physical dimensions of a load (force) column?
a. The proportionality between liquid level and pressure b. The attenuation of nuclear radiation by solid materials c. The variation of resistance of a wire as it is deformed d. The sensitivity of hair to moisture e. The principle that, if hydraulic flow-velocity is high, the corresponding pressure will be low, and vice versa
Vehicles built today are in service longer than vehicles built twenty years ago
A) True B) False
What factors should be considered when choosing an air filter?
A) the desired efficiency B) the smallest size particles it must filter out C) he pressure drop across the filter D) the desired efficiency and the pressure drop across the filter