The number of calls arriving at a switchboard from noon to 1 p. m. during the business days monday through friday is monitored for six weeks (i. e. 30 days). let x be defined as the number of calls during that one-hour period. the relative frequency of calls was recorded and reported as: values 5 6 8 9 10 11 12 13 14 15 rel. freq. 0.067 0.067 0.100 0.133 0.200 0.133 0.133 0.067 0.033 0.067 does the assumption of a poisson distribution seem appropriate as a probability model for these data? perform a goodness-of-fit procedure with α=0.05. note: combine cells to the following categories: 7 or less, 8, 9, 10, 11, 12 or more.

b

step-by-step explanation:

the word superfluous means unnecessary

a

step-by-step explanation:

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d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it

first one because it can't have a fraction in it

step-by-step explanation: