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# QNT 561 Week 5 Learning Team Assignment - Business Research Project Part 4 - A+ Guide!

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Descriptive Statistics
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QNT/561
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DESCRIPTIVE STATISTICS 2
Descriptive Statistics
Sales on Display
Normally Distributed
Central Tendency: Mean = 157.78
Dispersion: Standard Deviation = 84.19
Number: Participants Surveyed = 385
Min/Max: Min = 10; Max = 297
Confidence Interval: (146.40, 169.17)
See the histogram in Appendix B, and descriptive statistics in Appendix F.
Sales Not on Display
Normally Distributed
Central Tendency: Mean = 165.77
Dispersion: Standard Deviation = 84.24
Number: Participants Surveyed = 385
Min/Max: Min = 11; Max = 299
Confidence Interval: (153.29, 178.25)
See the histogram in Appendix B, and descriptive statistics in Appendix F. A scatterplot is in
Appendix E.
Display or not?
The sample size of participants purchasing items on display and not on displays is 210
and 175 respectively. In Appendix D, a bar chart shows the total sales for products on display
and not on display. The items on display show higher sales than the items not on display. In the
highest stratus of product prices, 250 to 300 dollars, the existence of a display did not affect the

DESCRIPTIVE STATISTICS 3
sales much. Furthermore, items in lowest stratus of product prices, 0 to 50 dollars, were greatly
affected by the existence of a display.
Descriptive Statistics Interpretation
Sales (in \$USD)
The sample size for the experimental study was 385 participants. The 385 participants
were chosen using a simple random sampling method. The sales in dollars were categorized into
two groups – sales of products with displays and sales of products with a display. The range of
prices of the products sold was \$10 to \$299 in Walmart. For products with display, the prices
ranged from \$10.00 to \$297.00, while for products not on display the prices ranged from \$11.00
to \$299.00. The histograms in Appendix B ensure that the sales follow a normal distribution.
Thus, the two important statistics can be calculated for the sales – mean and standard deviation.
The mean sales for products on display and not on display were \$157.78 and \$165.77
respectively. The standard deviation of sales for products on display and not on display were
\$84.19 and \$84.24. For products that were on display, there is a 95% probability that the
population sales (in \$USD) is between \$146.40 and \$169.17.
Appendix A
ID
Display
?
Sales ID Display? Sales ID Display? Sales ID
Display
?
Sales ID
Display
?
Sales ID Display? Sales

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