A blocked analysis of variance is conducted to see if different point of purchase displays produce different results. Four displays are being tested. Drugstores and supermarkets are serving as the blocked variables. After one month the sales results appear below. Treatments/Displays W X Y Z Drugstores 42 45 35 50 Blocks Supermarkets 50 55 45 58 Ensure that you display the ANOVA table. Discuss the results and state conclusions. Offer anything else that might be useful in this analysis.
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 blocked analysis of variance is conducted to see if different point of purchase displays produce different results. Four displays are being tested. Drugstores and supermarkets are serving as the blocked variables. After one month the sales results appear below.
Treatments/Displays
W X Y Z
Drugstores 42 45 35 50
Blocks
Supermarkets 50 55 45 58
- Ensure that you display the ANOVA table.
- Discuss the results and state conclusions.
- Offer anything else that might be useful in this analysis.
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