The reading rate for 60 students is shown in the frequency table below. Reading Rate (words per minute) Frequency 60 6 65 8 70 12 75 5 80 1 85 1 90 2 95 5 100 20 Determine the standard deviation of the data set and explain what it means in terms of the data. (4 points)

Type the correct answer in each box. use = 3.14 and if necessary, round your answers to the nearest hundredth. the area of the largest cross section of a sphere and the circumference of the sphere are in the ratio 4: 1. cm. the area of the largest cross section is about the radius of the sphere is cm. the circumference of the sphere is about cm2. the volume of the sphere is about cm?

Arandom variable x has a mean of 10 and a standard deviation of 3. if each value of x is multiplied by 2, what will the new mean and standard deviation be?

Arecent strip mall land development project included large amounts of paved surfaces. as a result of this project, groundwater levels in the developed area will most likely a. increase due to sealed artesian wells b. decrease as aquifers are not recharged c. decrease due to decreased surface runoff d. increase due to loss of unconfined aquifers e. increase due to a decrease in demand for fresh water