(Steps Shown) The mean life time of the fruit fly, Drosophila melanogaster in a laboratory, is 60 days with a variance of 235 days 2 . If a sample of 45
Question: The mean life time of the fruit fly, Drosophila melanogaster in a laboratory, is 60 days with a variance of 235 days 2 . If a sample of 45 flies were taken from this population, what is the probability that the mean life time is (a) less than 55 (b) between 58 and 66 (c) greater than 65 days?
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(All Steps) The US Department of Education states that students
(All Steps) Using the table of the standard normal distribution
![[Solution] In 2009, the mean score of](/images/solutions/MC-solution-library-68194.jpg "[Solution] In 2009, the mean score of participants from Minnesota")
[Solution] In 2009, the mean score of participants from Minnesota
![[See Steps] If it is known that](/images/solutions/MC-solution-library-68195.jpg "[See Steps] If it is known that a pregnant Gebu cow gives birth")
[See Steps] If it is known that a pregnant Gebu cow gives birth
![[Solution Library] variable Y is normally distributed](/images/solutions/MC-solution-library-68196.jpg "[Solution Library] variable Y is normally distributed with mean 75 and variance")
[Solution Library] variable Y is normally distributed with mean 75 and variance
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