Consider the butterfat production (in pounds) for a cow during a 305-day milk production period following the birth of a calf. a sample of 12 cows on a farm in wisconsin has a mean of 712.25 and a variance of 29957.84. a sample of 16 cows on a farm in michigan has a mean of 705.44 and a variance of 20082.13. assume the distribution of butterfat production is normally distributed for both farms. find a 9596 confidence interval for the difference in average butterfat production, wisconsin michigan
a.30.154 < wisconsin - michigan < 163.788
b.-118.112 < wisconsin - michigan < 131.732
c.- 126.143 < wisconsin - michigan < 139.763
d.- 130.617 < wisconsin - michigan < 122.841

answer:

sometimes

*i think

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.

i’m here for points.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour