The frequency table below gives the scores of students on a 10-point quiz. Score 1 3 4 6 7 8 9 10 Frequency 1 2 2 5 7 6 3 2 (a) Find the mean of the data set: Answer (b) Find the median of the data set: Answer (c) Find the 3rd quartile: Answer (d) Find the 1st quartile: Answer
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.
The frequency table below gives the scores of students on a 10-point quiz.
|
Score |
1 |
3 |
4 |
6 |
7 |
8 |
9 |
10 |
|
Frequency |
1 |
2 |
2 |
5 |
7 |
6 |
3 |
2 |
(a) Find the
(b) Find the
(c) Find the 3rd
(d) Find the 1st quartile: Answer
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