BNI of kinds of potato chips (descriptive statistics) - 2012

PEREZGONZALEZ Jose D (2012). BNI of kinds of potato chips (descriptive statistics). Journal of Knowledge Advancement & Integration (ISSN 1177-4576), 2012, pages 287-291. [Printer friendly]

BNI of generic brands (description)

Some potato chips5 are sold under a generic brand (eg, a supermarket brand) while others are sold under proprietary brands, with the latter having a somewhat better standing in regards to perceived quality. Thus, it is of interest to test whether such characteristic informs about overall nutritional balance (BNI) and, thus, whether it may help choose more balanced products. As part of his research on the nutritional balance of potato chips, Perezgonzalez (2012)3 also assessed whether generic and proprietary brands differed in regards to overall nutritional balance. This article provides descriptive information both about the sample of products under research (foodBNI) as well as about a hypothetical diet based on those products (dietBNI).


Proprietary brands were more abundant than generic brands, overall. Even so, the distribution of nutritional balance in the two groups was quite similar: they appeared as highly unbalanced6, clustering around BNI 80 and with their medians located at around BNI 827. They also showed a perceptible skewness towards higher levels of unbalance, with means located around BNI 86. Indeed, the 68% of generic products in the middle of the distribution had a nutritional balance somewhere between BNI 79.58 (P16) and BNI 98.29 (P84), while the middle 68% of named products had a nutritional balance somewhere between BNI 79.41 (P16) and BNI 98.62 (P84). In both cases the means were off-centered towards the 84th percentile.

Illustration 1: Kind of potato chips
Generic brand
Unbalance No Yes
≥60 1
≥70 9 3
≥80 23 9
≥90 9 1
≥100 5 1
≥110 1 1
Median 82.95 82.38
SPR 9.61 9.36
P16 79.41 79.58
P84 98.62 98.29
RSkew 6.07 6.56
Mean 86.70 85.86
StDev 10.74 9.84
zSkew 2.39 3.57
zKurt 0.47 2.88


As part of two hypothetical diets where the corresponding generic and named products contributed the same weight of chips, the resulting nutritional composition of such diets would still be highly unbalanced, of around BNI 70 for both diets.

Potato chips Protein Carbs Sugar Fat Sat.fat Fiber Sodium BNI
Named brand (unest.) 6.1 50.7 1.8 32.4 11.1 0.0 654.8 85.15
Named brand (est.) 6.1 50.7 1.8 32.4 11.1 4.4* 654.8 70.49
Generic brand (unest.) 5.2 50.3 1.3 33.1 14.3 0.0 589.3 84.06
Generic brand (est.) 5.2 50.3 1.3 33.1 14.3 4.4* 589.3 69.40
(*) Fiber content estimated from USDA database4.


Jose D PEREZGONZALEZ (2012). Massey University, Turitea Campus, Private Bag 11-222, Palmerston North 4442, New Zealand. (JDPerezgonzalezJDPerezgonzalez).

Want to know more?

BNI analysis of individual products
You can access either the BNI™ database or the 'BNI™ journal (2012, issue 5) - Tasty taytos' for individual nutrition analyses of each food product in the sample.
Wiki of Science - BNI of kinds of potato chips (further knowledge)
Two Wiki of Science pages provide further introductory and inferential information about the nutritional balance of kinds of potato chips.
Wiki of Science - Nutritional balance of potato chips
This Wiki of Science page provides an introduction to the BNI of potato chips, irrespective of brand.


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