Mathematics, 08.10.2019 23:00 sheram2010
Agroup of veterinarians at a major veterinary hospital was interested in investigating a possible link between enteroliths, stones that form in the colon of horses, and diet. they decided to conduct a survey of feeding practices of horses admitted to the veterinary hospital. to obtain a random sample of the 5000 horses that had been admitted over the last 10 years to the hospital, they sequentially assigned numbers starting with 1 to the horses in order of admittance. they then picked a random starting point and decided to sample every 100th horse to get a random sample of 50 horses. this procedure corresponds to a:
a. simple random sample because all horses have the same chance of being picked.
b. systematic sample because not all sample are possible. c. stratified random sample because the procedure is obviously not a simple random sample.
d. none of the answer choices is correct.
Answers: 3
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Mathematics, 21.06.2019 16:20
Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais
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