A study was conducted to determine the effects of organic fertilizer application on certain plant. Four types of fertilizer were applied to the three plant seedlings (21 days old) planted in a 20-inch clay pot. On the fifth week, the plant were harvested and the following data shows the weight in kgs. To test the hypothesis that the four types of fertilizer have same effects on the weight of plant harvested at a = 0.05, the procedure computed test statistic is 5.886. What is the conclusion of this test?
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.
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