Find the standard deviation of the data summarized in the given frequency distribution. The test scores of 40 students are summarized in the frequency distribution below. Find the standard deviation.

Please help #7,8,9 write the equation for each of the graphs

Find a natural cubic spline interpolating the data (-1, 13), (0,7), (1,9)

The central difference has the same value as the average of the forward and backward difference. True O False

A researcher for a tire company has collected data about the stopping distance in feet for different tire designs. The data range from 59 to 74 with an average of 65. Would it be better to have the origin at 0 on the axis, or at some other value? Explain. Yes, because all of the data values are less than 100, so 0 should be included. Yes, because 0 should always be included on the axis for a data set. No, because all of the data values fall in a small range which does not include or get close to 0. No, 0 should only be included in the values are less than 10.

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Please show EVERY STEP. Please SHOW your work!!!

Explain the steps to illustrate the graphical approach?

On what the distance an object travels depend?

What is the y of x