Difference between revisions of "Worksheets/Week4"
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# order amount is over €50 [+1]. Notice that a mistake was made | # order amount is over €50 [+1]. Notice that a mistake was made | ||
# with the last experiment: order minimum for free shipping was €60 [+1]. | # with the last experiment: order minimum for free shipping was €60 [+1]. | ||
S | S = c(-1, +1, -1, +1, -1, +1, -1, +2) | ||
# Does the purchaser need to create a profile first [+1] or not [-1]? | # Does the purchaser need to create a profile first [+1] or not [-1]? | ||
P | P = c(-1, -1, +1, +1, -1, -1, +1, +1) | ||
# Response: daily sales amount | # Response: daily sales amount | ||
y | y = c(348, 359, 327, 243, 356, 363, 296, 220) | ||
# Linear model using S, P and S*P to predict the response | # Linear model using S, P and S*P to predict the response | ||
model_sales_mistake = lm(y ~ S*P) | |||
summary( | summary(model_sales_mistake) | ||
# Uncomment this line if you run the code in RStudio | # Uncomment this line if you run the code in RStudio | ||
| Line 62: | Line 62: | ||
source('https://yint.org/contourPlot.R') | source('https://yint.org/contourPlot.R') | ||
contourPlot( | contourPlot(model_sales_mistake) | ||
</code> | </code> | ||
</div></html> | </div></html> | ||
Revision as of 14:39, 2 October 2019
Part 1
Your family runs a small business selling products online. The first factor of interest is whether to provide free shipping over €30 or over €50. The second factor is whether or not the purchaser must first create a profile before completing the transaction. The purchaser can still complete their transaction without creating a profile. Below are the data collected, showing the 8 experiments.
Part 2
Continuing with the case above:
Part 3
Your group is developing a new product, but have been struggling to get the product’s stability, measured in days, to the level required. You are aiming for a stability value of 50 days or more.