Question
A survey of a random sample of ninth-grade students from Alabama asked
whether the students owned a cell phone and whether they had brought a
personal electronic device to use for schoolwork that day. The two-way
table of row relative frequencies below shows the data.
Brought personal device vs. owns a cell phone
Did not bring device Brought device
Total
Does not own cell phone
0.57
F0.43
1.00
Owns cell phone
0.20
0.80
1.00
Based on the data, which of the following statements must be true about
the ninth-grade students from Alabama?
Choose 1 answer:
phone and did
Answer
80% of the students who brought a personal electronic device to use for schoolwork also own a cell phone.