A few years ago, a report in Lancet indicated that several people in New Mexico had succumbed to a rare disease, eosinophilia-myalgia syndrome (EMS). The only circumstance they seemed to have in common was that they had taken large quantities of an amino acid health food called tryptophan (tryptophan ingestion). Through investigation, a number of people were found throughout the country that had a diagnosis of EMS (development of EMS). The question was asked, was there a statistically significant relationship between ingesting tryptophan and developing EMS? (alpha = .05) Tryptophan Yes EMS No EMS
Yes Cell A 20 Cell C 18
No Cell B 17 Cell D 38
What is the level of measurement for the variable ‘tryptophan ingestion’?
a) Nominal
b) Ordinal
c) Interval
d) Ratio

If there are 3.281 feet in 1 meter, how many inches are in one centimeter

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota