• Study Resource
• Explore

Survey

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts
no text concepts found
Transcript
```The Normal Distribution
Select one of the five buttons below to take you to a
leveled question regarding the Normal Distribution and
the Empirical Rule.
Level 1
Level 4
Level 3
Level 2
Level 5
Question – Level 1
The amount of soap dispensed from a machine in a
restroom is normally distributed with a mean of 0.05 ounce
and a standard deviation of 0.001 ounce. If the machine is
used 500 times how many times would it be expected to
dispense more than 0.05 ounce?
Press Here for
the Solution
Questions
Question – Level 2
A battery’s lifetime is normally distributed with a mean of
500 days and a standard deviation of 61 days. If you have
427 batteries how many would you expect to last between
439 and 561 days?
Press Here for
the Solution
Questions
Question – Level 3
A group of 625 students has a mean age of 15.8 years with
a standard deviation of 0.6 years. The ages are normally
distributed. How many students are at least 17 years old?
Press Here for
the Solution
Questions
Question – Level 4
The incubation period for the eggs of a House Wren is
normally distributed with a mean time of 336 hours and a
standard deviation of 3.5 hours. What is the probability that
an egg will take more than 346.5 hours to hatch?
Press Here for
the Solution
Questions
Question – Level 5
The manufacturer of a light bulb is claiming that the life
span of the bulb is normally distributed, with a mean of 2000
hours and a standard deviation of 250 hours. You test 50
light bulbs. How many of the tested bulbs lasted less than
1750 hours or over 2500 hours?
Press Here for
the Solution
Questions
Solution – Level 1
Question
Questions
Solution – Level 2
Question
Questions
Solution – Level 3
Question
Questions
Solution – Level 4