Mathematics, 21.05.2020 23:01, starbae1084
Suppose the shutter life of a population of DSLR cameras are normally distributed with an unknown population mean and a population standard deviation of 5,000 cycles. A random sample of DSLR cameras from the population produces a sample mean shutter life of x¯=89,200 cycles.
What value of z should be used to calculate a confidence interval with a 80% confidence level?
Answers: 2
Mathematics, 21.06.2019 17:10, ieyaalzhraa
The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable
Answers: 2
Mathematics, 21.06.2019 17:30, chaparro0512
Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10
Answers: 2
Mathematics, 21.06.2019 22:00, IsabellaGracie
State one method by which you can recognize a perfect square trinomial.
Answers: 1
Suppose the shutter life of a population of DSLR cameras are normally distributed with an unknown po...
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