Have an account?
Skip to Content
Build your own quiz
Suggestions for you
10 questions
Show Answers
See Preview
- 1. Multiple Choice
434 Company pack coffee in bags marked as 250 g
A large number of packs of coffee were weighed and the mean and standard deviation were calculated as 255 g and 2.5 g respectively.
Assuming this data is normally distributed, what percentage of packs are underweight?
2.5%
3.5%
4%
5%
- 2. Multiple Choice
Students pass a test if they score 50% or more.
The marks of a large number of students were sampled and the mean and standard deviation were calculated as 42% and 8% respectively.
Assuming this data is normally distributed, what percentage of students pass the test? in percentage...
5
16
24
32
- 3. Multiple Choice
The ages of the population of people living in Meru area in Ipoh are Normally distributed with mean 43 and standard deviation 14
The town has a population of 5,000.
How many would you expect to be aged between 22 and 57?
You can use this Standard Normal Distribution curve:
1750
3860
3870
4330
- 4. Multiple Choice
68% of the marks in a test are between 51 and 64
Assuming this data is normally distributed, what are the mean and standard deviation?
Mean = 57
S.D. = 6.5
Mean = 57
S.D. = 7
Mean = 57.5
S.D. = 6.5
Mean = 57.5
S.D. = 13
- 5. Multiple Choice
The mean July daily rainfall in Hulu Kinta is 10 mm and the standard deviation is 1.5 mm
Assume that this data is normally distributed.
How many days in July would you expect the daily rainfall to be less than 8.5 mm?
5
6
7
10
- 6. Multiple Choice
The heights of male students are Normally distributed with mean 1.7 m and standard deviation 0.2 m
In a population of 400 male students, how many would you expect to have a height between 1.4 m and 1.6 m?
24
54
97
100
- 7. Multiple Choice
95% of students at school weigh between 62 kg and 90 kg.
Assuming this data is normally distributed, what are the mean and standard deviation?
Mean = 66 kg
S.D. = 7 kg
Mean = 76 kg
S.D. = 7 kg
Mean = 86 kg
S.D. = 7 kg
Mean = 76 kg
S.D. = 14 kg
- 8. Multiple Choice
A machine produces electrical components.
99.7% 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 = 1.190 cm
S.D. = 0.008 cm
Mean = 1.200 cm
S.D. = 0.004 cm
Mean = 1.200 cm
S.D. = 0.008 cm
- 9. Multiple Choice
A company makes parts for a machine. The lengths of the parts must be within certain limits or they will be rejected.
A large number of parts were measured and the mean and standard deviation were calculated as 3.1 m and 0.005 m respectively.
Assuming this data is normally distributed and 99.7% of the parts were accepted, what are the limits?
Between 3.075 m and 3.125 m
Between 3.080 m and 3.120 m
Between 3.085 m and 3.115 m
Between 3.090 m and 3.110 m
- 10. Multiple Choice
95% of students at school weigh between 62 kg and 90 kg.
Assuming this data is normally distributed, what are the mean and standard deviation?
Mean = 66 kg
S.D. = 7 kg
Mean = 76 kg
S.D. = 7 kg
Mean = 86 kg
S.D. = 7 kg
Mean = 76 kg
S.D. = 14 kg
- Answer choicesTagsAnswer choicesTags