Link to StatCrunch Find the mean of the following frequency table.    Round to two decimal place. Grade Frequency 49.5 – 59.5 22 59.5 – 69.5 11 69.5 – 79.5 10 79.5 – 89.5 8 89.5 – 99.5 3 Mean =

Which of the following are not true of polycarbonate lenses when compared to CR-39?

Link to StatCrunch A sample of the ages of 10 players on a baseball team is as follows: Find the standard deviation.  (Round to two decimal places.) standard deviation = 

Select the best base curve using corrected curve theory for the following Rx: +5.50 – 1.50 x 090

The index of refraction of polycarbonate is 1.586

Select the best base curve using corrected curve theory for the following Rx: -4.00 + 1.00 x 180

All of the following are true about minus lenses except:

The cerebellum:           1.  receives information from the cerebral motor cortex and body proprioceptors.           2.  assesses incoming information and calculates the optimum coordination of muscle activity.           3.  sends the “blueprint” for muscle coordination to the motor cortex.

Which is the most common type of refractive error?

Select the correct statement about serial processing.