(Pleave give the CORRECT answer, I will give out brainliest to this correct answer. Don't make up something to get brainliest be
cause I will know.) Suppose that you wanted to estimate the average amount of time a middle school student spends per day exercising. You decide to do this by taking a random sample of students from your school. You will calculate the mean time spent exercising for your sample. You will then use your sample mean as an estimate of the population mean.
Think about your estimate of the average amount of time students spend exercising each day. Given a choice of using a sample of size 30 or a sample of size 50, which should you choose? Explain your answer.
You should choose the larger sample size. This is because if you take the mean, it will help to cancel out outliers. For instance, most people exercise half an hour. With sample size of 10, there might be one person who doesn't exercise, thus dragging down the mean. A larger sample size would have a greater ratio of "average" people.
When a function intersects with the x-axis, it's y value must be 0. That means when the straight line intersects with the axis, it's at the point (4k,0), so plugging those numbers into our original equation yields:
