listed below are speeds (mi/h) measured from traffic on a busy highway, the simple random sample was obtained at 3:30 pm on a weekday. use the sample data to construct a 90 % confidence interval estimate of the population standard 61 63 63 57 63 52 60 59 60 70 62 68

answer: a. 74

step-by-step explanation:

it shows divided evenly, so add the 37+37 = 74

pretty sure 750 each month!

step-by-step explanation:

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.