Answer:
It's 6.
Step-by-step explanation:
this was so confusing
Answer:
You have to do it on a graph sheet before you can know the answer
Answer:
A
Step-by-step explanation:
This isn't even math and there all wrong
Answer: 0.0918, it is not unusual.
Step-by-step explanation:
Given : The length of time a person takes to decide which shoes to purchase is normally distributed with a mean of 8.54 minutes and a standard deviation of 1.91.
i.e.
minutes and
minutes
Let x denotes the length of time a person takes to decide which shoes to purchase.
Formula : ![z=\dfrac{x-\mu}{\sigma}](https://tex.z-dn.net/?f=z%3D%5Cdfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D)
Then, the probability that a randomly selected individual will take less than 6 minutes to select a shoe purchase will be :-
![\text{P-value=}P(x](https://tex.z-dn.net/?f=%5Ctext%7BP-value%3D%7DP%28x%3C6%29%3DP%28%5Cdfrac%7Bx-%5Cmu%7D%7B%5Csigma%7D%3C%5Cdfrac%7B6-8.54%7D%7B1.91%7D%29%5C%5C%5C%5C%5Capprox%20P%28z%3C1.33%29%3D1-P%28z%3C1.33%29%5C%20%5C%20%5C%20%5B%5Cbecaus%5C%20P%28Z%3C-z%29%3D1-P%28Z%3Cz%29%5D%5C%5C%5C%5C%3D1-0.9082%5C%20%5C%20%5B%5Ctext%7BBy%20using%20z-value%7D%5D%3D0.0918)
Thus , the required probability = 0.0918
Since, P-value (0.0918) >0.05 , it means this outcome is not unusual.
[Note : When a outcome is unusual then the probability of its happening is less than or equal to 0.05. ]