A. In general terms, how did the SAT scores of the students in the five grade categories change between 1988 and 1998? B. How did the overall average SAT score change between 1988 and 1998?

C. Briefly explain why the results might seem surprising or paradoxical.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?