A survey regarding height (in cm) of 60 boys belonging to BBA program at JGBS l was conducted. The following data was recorded. Height in cm Frequency 150-155 4 155-160 8 160-165 5 165-170 7 170-175 11 175-180 20 180-185 5 Student having height more than 170 is considered as tall student. Use appropriate graph to answer following questions:
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
A survey regarding height (in cm) of 60 boys belonging to BBA program at JGBS l was conducted. The following data was recorded.
|
Height in cm |
Frequency |
|
150-155 |
4 |
|
155-160 |
8 |
|
160-165 |
5 |
|
165-170 |
7 |
|
170-175 |
11 |
|
175-180 |
20 |
|
180-185 |
5 |
Student having height more than 170 is considered as tall student.
- Use appropriate graph to answer following questions:
- Number of students having height > 165
- Number of students having height more than 155
- Total tall students in class.
- Median using graphical method
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