10.21 For a certain type of electronic surveillance system, the specifications state that the system will function for more than 1,000 hours with probability at least 0.90. Checks on 40 such systems show that 5 failed prior to 1,000 hours of operation. Does this sample provide sufficient a = 0.05 a = b =

s = 8 H0: m = 64 Ha: m = 60 m = 60.

b a = 0.05 b = 0.01 s = 2.1 H0: m = 130 Ha: m = 129 H0: m Ú 130 Ha: m = 129 b information to conclude that the specification is not being met? Use .