B) a study wanted to compare the 50 states food expenditures. the researchers measured the amount spent by the state's entire population for food in grocery stores and total amount spent on restaurant food. from their 50 data points (washington dc not in the study), the researchers calculated a correlation of 0.988. based on this study, can we say that individuals who spend a lot on groceries also spend a lot at restaurants? what is the lurking variable?