Suppose a simple random sample of size n is drawn from a large population with mean muμ and standard deviation sigmaσ. the sampling distribution of x overbarx has mean mu subscript x overbarμxequals= ▼ startfraction mu over n endfraction μ n startfraction mu over startroot n endroot endfraction μ n sigmaσ startfraction sigma over n endfraction σ n muμ and standard deviation sigma subscript x overbarσxequals=

the answer is 5/14.

hope this .

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sitting on a chair

and using stick feet

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.