Complete Question
The complete qustion is shown on the first uploaded image
Answer:
The correct option is B
Step-by-step explanation:
From the question we are told that
The sample size is 
The mean is 
The standard deviation is 
Generally the standard error of this measurement is mathematically represented as
substituting values
ppb
Now the probability that the mean lead level from the sample of 49 measurements T is less than 15 ppb represented as P(X < 15 )
Next is to find the z value


Now checking the z-table for the z-score of -1 we have

I got this T_T y=175-35t
But maybe its y= -35t + 175 since its negative :)
•one of the salary amounts in company B is potentially an outlier.
• the median salaries of both companies are greater than 31000
•the mean salary at company B is greater than company A's
Bvgdgmhmgjm,jh,,,,,,,,,,,,,,,,,
36.00 will be enough to pay for fuel because if you multiply the 8.8 gallons of diesel needed by the fuel cost per gallon you get 35.112