In a survey, students are asked how many hours they study in…

In a survey, students are asked how many hours they study in a typical week.  A five-number summary of the responses is:  Min = 2, = 9, Median = 14,  = 20, Max = 60   Fill in the blank in the following sentence. About 75% of the students spent at least [hrs] hours studying in a typical week.  

The time taken for a computer to boot up, X, follows a mound…

The time taken for a computer to boot up, X, follows a mound-shaped (i.e. bell-shaped) distribution with a mean of 30 seconds and a standard deviation of 5 seconds.   What is the standardized score for a boot up time of… a.  x = 30 seconds? z-score = [za] b.   x = 20 seconds? z-score = [zb] c.  x = 35 seconds? z-score = [zc]

 45-year-old human immunodeficiency positive patient is seen…

 45-year-old human immunodeficiency positive patient is seen in clinic. He is non-compliant with his antiretroviral therapy and his CD4 count is noted to be 150 cells/µL. He is given a prescription for trimethoprim-sulfamethoxazole for prophylactic treatment of which of the following opportunistic infections?