3. There are 30 students who started a computer programming class in 7th grade and 30 students who started in 9th grade. The first group had a mean final project grade of 95% and the second group has a mean of 92%.
The line plot shows the differences after 10 rerandomizations. Determine whether the difference in the means of the two groups is significant based on the line plot. Explain your answer.

Which expression is equivalent to 4 square root 6 divided by 3 root 2

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Pls the last one and it has to be like number 6