Here are the tips of 25 randomly selected patrons, measured in percent of total bill.20.8 18.7 19.9 20.6 21.9 23.4 22.8 24.9 22.2 20.324.9 22.3 27.0 20.4 22.2 24.0 21.1 22.1 22.0 22.719.1 20.6 22.3 22.0 29.4 the standard deviation of tips is known to be 2.5.a) what is the 94% confidence interval for the mean tip of patrons if the distribution of tips is approximately normal? b) what is the 98% confidence interval for the mean tip of patrons if the distribution of tips is unknown?

3432532

step-by-step explanation:

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.

dont think so

step-by-step explanation:

10.416 meters per second

step-by-step explanation:

distance=1 00 meters

time= 9.6 seconds in decimal form or 9 3/5 as a mixed number

average speed= 100/9.6

=10.416 meters per second or 10 52/125 as a mixed number.