The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1498 cm cubed. Use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 191.6 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed.

10% of 1,900,000. show me how you got the answer

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

Which of the following is the major negative aspect of crossover designs for research studies? a. prohibitive cost b. residual effects c-subject drepout d. incomplete randomization e. large sample size required