statistics
posted by Gee .
The lifetime of a 2 volt nonrechargeable battery in constant use has a normal distribution of 516 hours and a standard deviation of 20 hours. What is the z score for batteries with lifetimes of 520 hours?
Respond to this Question
Similar Questions

Statistics
The lifetime of a 2volt nonrechargeable battery in contant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than ? 
Statistics
The lifetime of a 2volt nonrechargeable battery in contant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than ? 
Statistics
The lifetime of a certain smart phone battery has an unknown distribution with mean value of 8 hours and standard deviation of 2 hours. What is the approximate probability that the average battery lifetime of a sample of 36 batteries … 
Statistics
The lifetime of a certain smart phone battery has an unknown distribution with mean value of 8 hours and standard deviation of 2 hours. What is the approximate probability that the average battery lifetime of a sample of 36 batteries … 
statistics
The lifetime of a 2 volt nonrechargeable battery has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. What is the z score for batteries with lifetimes of 520 hours 
statistics
The lifetime of a 2 volt non rechargeable battery has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours.What is the z score for batteries with lifetimes of 600 hours 
statistics
The lifetime of a 2 volt non rechargeable battery in constant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. What is the zscore for batteries with lifetimes of 600 hours? 
statistics
A company produces batteries whose lifetimes are normally distributed with a mean of 100 hours. It is known that 90% of the batteries last at least 40 hours. (i). Estimate the standard deviation lifetime. (3 marks) (ii). What percentage … 
statistics
The lifetime of a 2volt nonrechargeable battery in constant use has a normal distribution with a mean of 516 hours and a standard deviation of 20 hours. Ninety percent of all batteries have a lifetime less than 
Statistics
A company makes batteries with an average life span of 300 hours with a standard deviation of 75 hours. Assuming the distribution is approximated by a normal curve fine the probability that the battery will last . Less than 250 hours …