sed on information from the Statistical Forum, the population mean daily cost of erating a car is $ 18. A random sample of 26 students who own cars found a sample ean operating cost per day of $17.30. The population standard deviation is known and value is $3.2. Test the alternative hypothesis that the population mean daily cost of erating a car for all students is lower than the national population average of $18. Use e 1% level of significance. Specify the null and the alternative hypotheses. Compute the Sample Test Statistic for this hypothesis test. Find the p-value for this hypothesis test. What is the decision for this hypothesis 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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