A researcher collected data on the speed of vehicles traveling through a construction zone on a state highway, where the posted speed limit was 25mph. The recorded speed of 20 randomly selected vehicles is given below: 20382439274028372935303132193318342 13623 Calculate the sample mean, standard deviation, and the median of the above data. (Round to one decimal place

Step-by-step explanation:

Given

Solving (a): The sample mean

This is calculated as:

Solving (b): The standard deviation

This is calculated as;

So, we have:

Solving (c): The median

First, sort the data in ascending order

The position of the median is calculated as:

The 10.5th item represents the mean of the 10th and 11th item.

So, median is:

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.