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- 1. Multiple ChoiceWhat shape is a normal distribution curve?Half curveRound curveBell curveSquare curve
- 2. Multiple ChoiceWhich is NOT a characteristic of normal distribution?SymmetricalBell-shapedRandomContinuous
- 3. Multiple ChoiceWhich one of the following is a FALSE statement about the standard normal curve?Its standard deviation varies.It is bell-shapedIt is symmetric around 0.Its mean is constant at 0.
- 4. Multiple ChoiceThe normal curve is symmetrical about the mean.TrueFalse
- 5. Multiple Choice
What is the the total area under the standard normal distribution curve?
100
25
.5
1
- 6. Multiple ChoiceIf 10 is added to every value in a set of data, what will happen to the value of the mean?it will increase by 10it will decrease by 10it will stay the sameit will both increase and decrease
- 7. Multiple ChoiceIf 10 is added to every value in a set of data, what will happen to the value of the standard deviation?it will increaseit will decreaseit will stay the sameit will both increase and decrease
- 8. Multiple Choice
Between what two standard deviations of a normal distribution contain 68% of the data?
one below and one above
two below and two above
two below and zero
zero and two above
- 9. Multiple Choice
Between what two standard deviations of a normal distribution contain 95% of the data?
one below and one above
two below and two above
two below and zero
zero and two above
- 10. 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
- 11. Multiple Choice
A machine produces electrical components.
99.8% of the components have lengths between 1.176 cm and 1.224 cm.
Assuming this data is normally distributed, what are the mean and standard deviation?
Mean = 1.210 cm
S.D. = 0.008 cm
Mean = 1.200 cm
S.D. = 0.004 cm
Mean = 1.190 cm
S.D. = 0.008 cm
Mean = 1.200 cm
S.D. = 0.008 cm
- 12. Multiple Choice
This data is normally distributed. What percent of the data is in the shaded region?
68%
95%
99.8%
50%
- 13. Multiple Choice1. Which best describes the shaded part of this normal distribution graph?All data that is one or higher.All data that is one or more standard deviations above the mean.All data that is between 1 and 3.All data that is above the mean.
- 14. Multiple Choice
This data is normally distributed. What percent of the data is in the shaded region?
68%
95%
99.8%
50%
- 15. Multiple Choice
This data is normally distributed. What percent of the data is in the shaded region?
68%
95%
99.8%
50%
- 16. Multiple Choice
This data is normally distributed. What percent of the data is in the shaded region?
68%
32%
16%
50%
- 17. Multiple Choice
This data is normally distributed. What percent of the data is in the shaded regions?
5%
95%
2.5%
50%
- 18. Multiple ChoiceThis data is normally distributed. What percent of the data is in the shaded region?5%95%2.5%50%
- 19. Multiple Choice
This data is normally distributed. What percent of the data is in the shaded region?
99.8%
0.2%
0.15%
50%
- 20. Multiple Choice
In a normal distribution, the mean, median and mode are
within 1 standard deviation
very similar
within 0.1%
equal
- Answer choicesTagsAnswer choicesTags