A Random Sample of 10 University Students Was Surveyed to Determine

question 50

Short Answer

A random sample of 10 university students was surveyed to determine the amount of time spent weekly at the library.The times are: 13,14,5,6,8,10,7,12,15,and 3.If the times are normally distributed with a standard deviation of 5.2 hours,estimate with 90% confidence the mean weekly time at the library by all university students.

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Definitions:

Formula

A mathematical or symbolic representation of relationships among entities or for solving a problem.

Ionic Compound

An ionic bonded substance formed from ions interconnected by electrostatic attractions.

Cu2+

A positively charged ion of copper, formed when copper loses two electrons.

Nitrogen

A chemical element with symbol N and atomic number 7, it is a non-metallic gas that makes up 78% of the Earth's atmosphere by volume.