A teacher instituted a new reading program at school. After 10 weeks in the program, it was found that the mean reading speed of a random sample of 19 second grade students was 91.7 wpm. What might you conclude based on this result? A) A mean reading rate of 93.9 wpm is unusual since the probability of obtaining a result of 93.9 wpm or more is . The new program is abundantly more effective than the old program.
B) A mean reading rate of 93.9 wpm is not unusual since the probability of obtaining a result of 93.9 wpm or more is. The new program is not abundantly more effective than the old program.

The correct option is

(A) <0.05

A) A mean reading rate of 93.9 wpm is unusual since the probability of obtaining a result of 93.9 wpm or more is <0.05_. The new program is abundantly more effective than the old program.

Step-by-step explanation:

An unusual event is one that is less likely to occur or one that realy occurs. It is an event that is unlikey to ocur except and the probability of an unlikely event is normally taken as < 0.05

An unusual even is defined as a value of data that is larger or smaller than the  mean by mor than two standard deviations

The correct answer is

A) A mean reading rate of 93.9 wpm is unusual since the probability of obtaining a result of 93.9 wpm or more is  < 0.05_. The new program is abundantly more effective than the old program.

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step-by-step explanation:

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