x-rays and lasers are used to inspect solder-joints on printed circut boards. A manufacturer of laser inspection equitment claims that their equiptment can inspect least 10 solder joints per second, when they are spaced 0.1 inch apart. a potentia buyer tests the equiptment on 48 different boards to determine whether the claim is true at the 0.05 level. the mean number of solder joints inspected is 9.7 with a standard devation of 0.2. can the manufacturer's claim be supported?
