QUESTION 9 OF 11 Report
Mr. Battles raised all of his students' scores on a recent exam by 5 points. What effect did this
have on the mean and standard deviation of the scores?
The mean increased by 5 points, but the standard deviation remained the
same.
The mean remained the same, but the standard deviation increased by 5
points.
Both the mean and standard deviation increased by 5 points.
D
Both the mean and standard deviation remained the same.
Ε
I would be guessing.

10

Step-by-step explanation:

sadasdasdasd

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.

what's the question?

step-by-step explanation:

there is no question.