It is known that 65% of all brand a external hard drives work in a satisfactory manner throughout the warranty period (are "successes"). suppose that n = 15 drives are randomly selected. let x = the number of successes in the sample. the statistic x/n is the sample proportion (fraction) of successes. obtain the sampling distribution of this statistic. [hint: one possible value x/n is 0.2, corresponding to x = 3. what is the probability of this value (what kind of random variable is x)? ] (round your answers to three decimal places.)
answer: first option i.e. 'a' is correct.
since we have given that
number of minutes to wrap a small gift box = 4 minutes
we need to find the number of gifts to be wrapped in 5 minutes
since there is a direct variation, as the number of minutes will increase with number of gifts to be wrapped.
so, let the number of gifts to be wrapped in 5 minutes be x.
so, it becomes,
hence, first option 'a' is correct.