The pH measurements of water specimens from various locations along a given river basin are Normally distributed with mean 8 and standard deviation 0.3. You take water specimens from 4 randomly selected locations on this river basin.
1. What is the probability that the mean pH measurement of these 4 specimens is greater than 8.2?
A. 0.2546
B. 0.7454
C. 0.0918
D. 0.9082

C) 0.0918

Step-by-step explanation:

Let be the mean pH measurement of these 4 specimens, we know that this random variable is normally distributed with mean 8 and standard deviation , this because we have a sample size n = 4. We are looking for , the z-score related to 8.2 is (8.2-8)/0.15=1.3333, therefore, .

the camry sales+accord sale=828,000. to make it so the two numbers are 18 thousand apart and still equal 828,000, you first need to find out what half of 828,000 is. 828,000/2=414,000. for the two numbers to equal 828,000, you have to add the same amount as you subtract from the middle. in this case, the number is 9,000 because it's half of 18,000. to equal 828,000, you have to add 9,000 to 414,000 for the camry and subtract 9,000 from 414,000 for the accord. 414,000+9,000=423,000.

414,000-9,000=405,000.

423,000+405,000=828,000.

423,000-405,000=18,

hope it