11. You have two ways to travel from Irbid to Aqaba. The first one is Al-Sahrawi road and the second one is Dead Sea road. The mean and standard deviation of reach time is summarized in the table below: Street X bar Sigma Al-Sahrawi (S) 5.60 hours 0.40 hours 50 Dead- Sea (D) 5.30 hours 0.30 hours 100 Where X bar: Sample Mean Sigma: Population Standard Deviation n: Sample Size The result of Testing the state hypothesis at 0.01 significance (the two samples are unrelated) HO: p_ssp_D H1: p_s>p_D is:
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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