A construction company that installs drywall wanted to investigate how a person's age afects how much dry wall they can install in a week. On one hand, it would
seem that the younger workers would be able to install more, but it seems that
experience would also play a role. Two random samples were taken Assume the
distributions are normal
Age 18-22
Age 25-23
(sheets/week)
(sheets/week)
92
104
109
116
93
96
81
104
115
108
109
108
84
116
121
112
94
120
116
108
a) Set up the full and alternative hypotheses to see if there is a difference in the
average number of sheets of dry wall that a person can install per week based on
age

were is the equation

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

step-by-step explanation: