Mary beth is running an experiment and wants to make sure she has randomly assigned her 40 participants to the two conditions. which of the following methods of forming groups would give her random assignment? 1. assign the first 20 to show up to the first group and the second 20 to the second group. 2. post two sign-up sheets: 9 a. m. for the first group and 2 p. m. for the second group. 3. participants with names in the first half of the alphabet are in the first group; the second half of the alphabet are in the second group. 4. flip a coin as each participant arrives: heads indicates assignment to the first group, tails indicates assignment to the second group.

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;

the correct answer is modern american cars are not available due to trade restrictions.

trade between cuba and the united states have serious restrictions. the u.s. imposed an economic embargo on cuba, that among other things means that modern american cars are not available due to trade restrictions.

in response to some governmental actions of the authorities from cuba, president john f. kennedy proclaimed an embargo on trade between both countries in february 1962. the trade embargo remains active until this day and was implemented directly by the departments of commerce and the department of treasury.

in president trump’s administration, there is a national security presidential memorandum that "strengthens the policy of the u. s.", affecting trade with cuba.

the article must be ratified by three-fourths (38) of states within a proscribed deadline.

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