Tyesha found that the z-statistic was 2.1 and that the critical z-values were -1.96 and 1.96. which of the following is a valid conclusion based on these results?

one can reject the null hypothesis.
one can reject the alternate hypothesis.
one can accept the null hypothesis.
one cannot accept or reject the null hypothesis.

One can reject the null hypothesis.

Step-by-step explanation:

This is a 2-sided hypothesis test since we have 2 critical values; -1.96 and 1.96. The test is usually to compute the test statistic then reject the null hypothesis if the test statistic lies in the critical/rejection region.

In our case, we reject the null hypothesis since 2.1 lies to the right of 1.96 which forms a part of the critical region

b

step-by-step explanation:

write an equation for the line of best fit. then predict the number of milk cow operations in the year 2005.

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.