In this paper, we propose lifetime model which is obtained from the inverse Weibull distribution and the exponentiated Kumaraswamy. The presented distribution includes as special cases the inverse exponential, inverse Weibull, inverse Rayleigh and exponentiated inverse Weibull distributions. We study the main properties of this distribution, with special emphasis on its moments and some characteristics related to reliability studies. We also discuss parameter estimation considering the methods

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... f moments and maximum likelihood. An application reveals that the model proposed can be very useful in fitting real data.