Historically, approximately 93% of students earned a C or better grades in an elementary statistics course. Suppose 100 students will be randomly selected from students in this course. Describe the sampling distribution of sample proportion of students who earn a C or better grades. Is it appropriate to use a normal probability model to describe this sampling distribution of sample proportion

The state in which the manufacturing company you work for is located regulates the presence of a particular substance in the environment to concentrations ≤ x. recently-released, reliable research endorsed by the responsible federal agency conclusively demonstrates that the substance poses no risks at concentrations up to 5x. your company has asked you to consider designing a new process with a waste discharge stream containing up to 2x of the substance. based on the stated conditions, describe this possible.