A group of 8 students was asked, "How many hours did you watch television last week?" Here are their responses: 18, 13, 10, 9, 7, 11, 11, 18
Find the median and mean number of hours for these students.
If necessary, round your answers to the nearest tenth.

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36