Question
The monthly cost of your bills in a small town is normally distributed, with a mean of $250 and a standard deviation of $20. A
The monthly cost of your bills in a small town is normally distributed, with a mean of $250 and a standard deviation of $20. A utility bill is randomly selected.
1. Find the probability that the utility bill if greater than $280.
The lower limit is _______
The upper limit is _______
= ________
= ________
Conclusion: so, there is a ________ chance your bill will be greater than $280.
2. Find the probability that the utility bill is between $250 and $280.
Use the calculator:
The lower limit is _______
The upper limit is _______
= ________
= ________
Conclusion: so, there is a ____________________________________________
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