How close is the theoretical distribution for the middle five columns? These columns are less than 3 up and down from the theoretical mean (13). Because the theoretical standard deviation is 2.55, these five bins encompass about standard deviation. Use the counters at the top of each column to find the number of balls in each of the five central columns and enter your values in the table. Add these five values and enter the sum in the Total column. How closely does this total match the theoretical percentage of balls that you would expect to land in this area ( standard deviation from the mean)?

Consider the following geometry problems in 3-space enter t or f depending on whether the statement is true or false. (you must enter t or f -- true and false will not work.) f equation editorequation editor 1. a plane and a line either intersect or are parallel t equation editorequation editor 2. two planes parallel to a third plane are parallel f equation editorequation editor 3. two lines either intersect or are parallel f equation editorequation editor 4. two planes orthogonal to a third plane are parallel f equation editorequation editor 5. two planes orthogonal to a line are parallel f equation editorequation editor 6. two planes either intersect or are parallel f equation editorequation editor 7. two lines orthogonal to a third line are parallel t equation editorequation editor 8. two lines parallel to a third line are parallel t equation editorequation editor 9. two planes parallel to a line are parallel f equation editorequation editor 10. two lines parallel to a plane are parallel f equation editorequation editor 11. two lines orthogonal to a plane are parallel