gg1040
28.06.2019 •
Mathematics
Asports writer wished to see if a football filled with helium travels farther, on average, than a football filled with air. to test this, the writer used 18 adult male volunteers. these volunteers were randomly divided into two groups of nine men each. group 1 kicked a football that was filled with helium to the recommended pressure. group 2 kicked a football that was filled with air to the recommended pressure. the mean yardage for group 1 was ¯1=300 yards with a standard deviation of =8 yards. the mean yardage for group 2 was ¯2=296 yards with a standard deviation of =6 yards. assume the two groups of kicks are independent. let and represent the mean yardage we would observe for the entire population represented by the volunteers if all members of this population kicked, respectively, a helium‑filled football and an air‑filled football. assuming two‑sample procedures are safe to use and using option 1 for the degrees of freedom, a 90% confidence interval for − is: (−3.112,11.112) . (−1.82,9.8196) . (−1.848,9.8477) .
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Ответ:
Rigid transformations are ways to move an object while not changing its shape or size. A
translation (slide) moves . object vertically. horizontally or both. A reflection (flip) moves an object across a line of reflection as in a mirror. A rotation (tum) moves an object clockwise or
object across a line of reflection as in a mirror. A rotation (tum) moves an object clockwise or
counterclockwise around s point.
Step-by-step explanation: