You were given mean battery life (5750)and standard deviations of battery life for each battery type (678.833939 for NiMH and 651.9758369 for lithium)
Use this information to calculate:
(a) The probability that a sample of 10 NiMH will have an average battery life of more than 6,000 hours.
(b) The probability that a sample of 50 NiMH will have an average battery life of more than 6,000 hours.
(c) The probability that a sample of 5 lithium ion batteries will have an average life of less than 5,000 hours.
(d) The probability that a sample of 25 lithium ion batteries will have an average life of less than 5,000 hours."