While studying medical treatments, scientists noticed a relationship between two of the treatments when applied
together. As Treatment X became more effective, Treatment Y
became less effective. Which scatter plot BEST demonstrates
this relationship?
Ο Α.
ОВ.
Effectiveness of
Treatment
Effectiveness of
Treatment Y
Effectiveness of
Treatment x
Effectiveness of
Treatment
OC.
D
Effectiveness of
Treatment Y
Effectiveness of
Treatment Y
Effectiveness of
Treatment
Effectiveness of
Treatment x

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Ithink i know it but i want to be sure so can you me out ?