Good Day I have the following homework question . Please assit with sharing how you would approach anwering the below quetions. The Record of a state-owned company indicated that of all vehicles undergoing emissions testing during the previous year , 70% passed on the first test. A random sample of 200 cars tested in the country durring the current year reveals that 62% passed the initial test. Does this dat asugget that the proportion for this country is less than the previous countrywide proportio ? Test the relevant hypothesis at the 5% level of significance. State the conclusion of this test . Give a reason for your 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.
Good Day I have the following homework question .
Please assit with sharing how you would approach anwering the below quetions.
The Record of a state-owned company indicated that of all vehicles undergoing emissions testing during the previous year , 70% passed on the first test. A random sample of 200 cars tested in the country durring the current year reveals that 62% passed the initial test. Does this dat asugget that the proportion for this country is less than the previous countrywide proportio ? Test the relevant hypothesis at the 5% level of significance.
State the conclusion of this test . Give a reason for your answer
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