8. The specimen of copper wirer drawn from a large lot have the pollowing breaking strongth (in kg weight] 578,572, 570, 568,572,578,570, 572,598, 544 , Test whether the mean breaking strength of the lot may be taken to be 578 kg weight at 5% level of significance

if you was gonna solve for a, a is a   < -12

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step-by-step explanation:

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %