The lifetime of a cellphone is normally distributed with a mean of 18 months and a standard deviation of 2.8 months. What is the probability a cell phone lasts less than 10.88 months?
The lifetime of a cellphone is normally distributed with a mean of 18 months and a...
The lifetime of a battery in a certain application is normally distributed with mean = 16 hours and standard deviation o = 2 hours. a) What is the probability that a battery will last more than 19 hours? Select] b) Find the 10th percentile of the lifetimes. (Select] c) A particular battery lasts 14.5 hours. What percentile is its lifetime on? Select)
The lifetime of lightbulbs that are advertised to last for 6500 hours are normally distributed with a mean of 6700 hours and a standard deviation of 300 hours. What is the probability that a bulb lasts longer than the advertised figure? Probability =
The lifetime of lightbulbs that are advertised to last for 5700 hours are normally distributed with a mean of 5950 hours and a standard deviation of 150 hours. What is the probability that a bulb lasts longer than the advertised figure? Use Excel to obtain more accuracy.
The lifetime of the battery of a certain make of cars is normally distributed with mean 5 years and standard deviation 6 months. An owner of this type of car wants to take a chance and replace the battery at the 3rd quartile of the distribution. In how many months he should have the battery replaced in case the battery lasts until then (round off to the nearest integer)?
13. The lifetime of lightbulbs that are advertised to last for 5000 hours are normally distributed with a mean of 5100 hours and a standard deviation of 100 hours. What is the probability that a bulb lasts longer than the advertised figure? Use three decimals of accuracy in your answer. Probability = 14. The combined math and verbal scores for females taking the SAT-I test are normally distributed with a mean of 998 and a standard deviation of 202 (based...
Your new cell phone has a mean lifetime of 5 years with a standard deviation of 1.5 year. What is the probability your cell phone will outlast your two year contract? Assume lifetime data is normally distributed.
Suppose the lengths of the pregnancies of a certain animal are approximately normally distributed with mean mu equals 259 days and standard deviation sigma equals 18 days what is the probability that a randomly selected pregnancy lasts less than 252 days?
A manufacturer knows that their items have a normally distributed length, with a mean of 18 inches, and standard deviation of 5.7 inches. If one item is chosen at random, what is the probability that it is less than 13 inches long? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.7 years, and standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than...
QUESTION 11 A full charged battery of a given mobile phone lasts a time T under full utilization It was found that this lifetime T is normally distributed with a mean of 180 min and standard deviation of 20min. What value of lifetime in minutes is exceeded with 90% probability? 120.5 mn 134.4 mn 143.6 mn 154.3 mm 161.3 mn QUESTION 12 A full charged battery of a given mobile phone lasts a time T under full utilization It was...
The mean lifetime of a tire is 37 months with a standard deviation of 8 months. If 127 tires are sampled, what is the probability that the mean of the sample would be less than 38.85 months? Round your answer to four decimal places.