Tutor profile: Henry S.
Calculate the derivative: y=3x^2+3x
I have a sample of 7 data points that is assumed to be normal. The population standard deviation is unknown. Is a t-distribution or z-distribution more appropriate for statistical inference?
When I joined the gym, I paid a $100 fee. In addition, I need to pay $20 per month. What is the proper linear equation for the gym expense?
needs and Henry will reply soon.