A marketing analyst wishes to see whether there is a difference in the average time a customer has to wait in a checkout line in three supermarkets in Batangas City. PureGold Walter Mart SM 3 5 1 2 8 3 5 9 4 6 6 2 3 2 7 1 5 3 At 0.05 level of significance, is there a significant difference in the mean waiting times of customers for each store? Use 4 decimal places STATISTICS = _____ COMPUTED VALUE = _____ TABULAR VALUE = _____ CONCLUSION = _____
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.
A marketing analyst wishes to see whether there is a difference in the average time a customer has to wait in a checkout line in three supermarkets in Batangas City.
PureGold Walter Mart SM
3 5 1
2 8 3
5 9 4
6 6 2
3 2 7
1 5 3
At 0.05 level of significance, is there a significant difference in the mean waiting times of customers for each store? Use 4 decimal places
STATISTICS = _____
COMPUTED VALUE = _____
TABULAR VALUE = _____
CONCLUSION = _____
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