Please choose the appropriate t-test to use (Independent vs. One-Sample) and then a) solve for t, b) find the df (degrees of freedom and label cut-off values at the .05 and .01 level and finally, c) state your conclusion (reject or fail to reject) for each level

1. Police officers are looking to decrease the speed driving for young drivers as they are the ones who speed and get tickets the most. They calculated the speed of 5 young drivers at 50, 65, 45, 67, and 55 mph and then they calculated the speed of 5 other young drivers when they knew their speed was being recorded with a device at 52, 50, 53, 48, and 58 mpg. Does the device on the cars of young people make a difference in their speed?

2. Police offers are looking to decrease the speed which is 72mph and a standard deviation of 6), for young drivers. After a device was put in their car, new speeds were calucalted at 60, 65, 55, 48, and 58mph. Is there a difference in speed after a device was put into their cars?