Null or Aiternative Hypothesis One-tailed or Two- tailed Test Mathematical Symbols Statement 1.The number of books in the library is above 1000. 2.90% of the Covid 19 patients have mild symptoms. 3. The phone's average battery life is not 12 hours. 4. All 35 students volunteered for the club's outreach program. 5. There is no significant difference in my mean daily allowance before and during the pandemic which is 50 pesos. Guide Questions: a. What makes you decide whether to identify the statement as null or alternative hypothesis? D. How did you determine whether the test to be used is one-tailed or two- tailed?
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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