The fact that there is an absence of swine in north africa and the middle east today can be most simply attributed to:

In a citizens elect the president as head of government separately from the legislature. question 1 options: parliamentary democracy communist state presidential democracy autocratic state

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling

Bea was under a great deal of stress at work, and her health had started to suffer. her doctor treated her using where bea had sensors attached to various parts of her body and watched her vital signs on a computer screen until she learned to relax.