The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated by a normal distribution with a mean value of 130 sec and a standard deviation of 25 sec. the fastest 10% are to be given advanced training. what task times qualify individuals for such training? (round the answer to one decimal place.)

The task time for the fastest 10% should be greater than 161.9 seconds.

Step-by-step explanation:

Since it is given that:

Mean = 130 seconds

Standard Deviation = 25 seconds

The fastest of the 10% can be found by finding the area corresponding to the required normal distribution curve

Thus the Z value  for the normal distribution curve for the given values of mean and deviation is

Z = 1.2796

Thus the value of score can be found from the equation

Applying values we get

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9

probability for j is 1/4

while

a is 1/6