A student working an independent research project wants to investigate if there is an association between the amount of sleep someone gets and their body mass index $($BMI$)-$ an indicator of body fatness. For a sample of $45$ students, she records their BMI and the average amount of sleep they get on weeknights over a two$-$week period. What would it mean for average amount of sleep to be negatively correlated with BMI?A student working an independent research project wants to investigate if there is an association between the amount of sleep someone gets and their body mass index $($BMI$)-$ an indicator of body fatness. For a sample of $45$ students, she records their BMI and the average amount of sleep they get on weeknights over a two$-$week period. What would it mean for average amount of sleep to be negatively correlated with BMI?It would mean that individuals who get more sleep tend to have lower BMIs.It would mean that individuals who get less sleep tend to have lower BMIs.Only positive association can occur between these two variables.It would mean that individuals who tend to have lower BMIs get less sleep.There is no association between the average amount of sleep and BMI.