The median is 7. By definition of "median," half of the data values are below 7; half are above 7. Thus, the first statement is FALSE.
Spread: in the 2nd statement we are comparing the spread from lower quartile (4) to the median (7) and that from the median (7) to the upper quartile (9). In other words, we're comparing 3 to 2. This statement is TRUE.
The 3rd statement is the opp. of the 2nd statement, and thus is FALSE.
The 4th statement is FALSE. See my comments regarding the 1st statement.
She needs to score a 91 on her next test because 85+78+77+69+91=400 and 400 divided by 5 gives you a mean of 80.
Its 23.1 one because in 23 minutes they travel three miles
