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- 1. Multiple ChoiceWhat shape is a normal distribution curve?Half curveRound curveBell curveSquare curve
- 2. Multiple ChoiceAccording to the empirical rule, what percentage of data falls within 1 standard deviation?25%68%95%99.7%
- 3. Multiple ChoiceAccording to the empirical rule, how much of the data falls within 3 standard deviations?25%68%95%99.7%
- 4. Multiple Choice
Which of the following is a disadvantage of the Empirical Rule?
There is no result for 3 standard deviations.
It is very conservative.
There is no result for 1 standard deviation.
The data has to be approximately normal.
- 5. Multiple Choice
When labeling the axis for a normal distribution curve, the notation is used to represent standard deviation. What is this Greek letter called?
Omega
Delta
Lowercase Sigma
Lowercase Omega
- 6. Multiple ChoiceIn a factory, the weight of the concrete poured into a mold by a machine follows a normal distribution with a mean of 1150 pounds and a standard deviation of 22 pounds. Approximately 95% of molds filled by this machine will hold weights in what interval?1084 to 1216 pounds1106 to 1150 pounds1106 to 1194 pounds1128 to 1172 pounds
- 7. Multiple ChoiceAt a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of 0.6. What percentage of students at the high school have a GPA between 2.3 and 3.5?68%99.7%95%84%
- 8. Multiple ChoiceThe mean life of a tire is 30,000 km. The standard deviation is 2000 km.
Then, 68% of all tires will have a life between ___________ km and __________ km.28,000 km and 32,000 km.24,000 km and 34,000 km.26,000 km and 34,000 km.27,000 km and 31,000 km. - 9. Multiple ChoiceThe shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.
About what percent of the products last between 12 and 15 days?68%34%16%2.5% - 10. Multiple Choice
Use the following information and the Empirical Rule to estimate the answer.
The ages of golfers are normally distributed, with a mean of 38 and a standard deviation of 4.
Find the proportion of golfers that are between 30 and 46 years old.
68%
94%
95%
99.7%
- 11. Multiple Choice
Use the following information and the Empirical Rule to estimate the answer.
The ages of golfers are normally distributed, with a mean of 38 and a standard deviation of 4.
Find the proportion of golfers that are older than 42.
13.5%
16%
50%
85%
- 12. Multiple Choice
Use the following information and the Empirical Rule to estimate the answer.
The ages of golfers are normally distributed, with a mean of 38 and a standard deviation of 4.
There are 500 golf members at the Mathy Country Club. How many are younger than 34?
16
80
100
150
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