Agroup of students is investigating whether copper is a better thermal conductor than steel. the students take a copper wire and a steel wire of the same length and diameter. they put equal lengths of wax on one end of each wire and dip the other end into a beaker of hot water. the length of wax left on the wires after 10 minutes is shown. experimental observations copper steel original length of wax: 3 cm 3 cm length of wax after 10 minutes: 0.7 cm 1.8 cm what was the dependent variable in this experiment? type of wire used original length of wire original length of wax thermal conductivity of wire

It appears that people who are mildly obese are less active than leaner people. one study looked at the average number of minutes per day that people spend standing or walking. among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately normally distributed with mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?