The eighth-grade students at Shady Oak School took a poll about their afterschool activities. The study concluded that 75% of th
e eighth-grade students at the school currently take part in at least two afterschool activities, which is not a valid generalization. Which sample could have led the researcher to make the invalid generalization? A.
every other eighth-grade student who was issued a report card during the fall semester
B.
an equal number of eighth-grade boys and girls picked randomly from the school directory
C.
an equal number of eighth-grade students chosen by chance from the athletic teams and school clubs
D.
every third student who enters any eighth-grade class at a particular hour of the day
An urn initially contains one red and one blue ball. At each stage, a ball is randomly chosen and then replaced along with another of the same color. Let X denote the selection number of the first chosen ball that is blue. For instance, if the first selection is red and the second blue, then X is equal to 2.
