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Owner: mollypie13
Created: Feb 14, 2016
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Groceries and GMO's
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My group and I conducted a survey designed to discover how much the average shopper knows about Genetically Modified Organism's (GMO's) and/or Genetically Modified crops used in our food production; as well as there opinion about the level of disclosure by companies who use them. We polled 120 various grocery shoppers of all ages that were purchasing food for themselves or their families while either entering or exiting each of our perspective local grocery store. Therefore, we used a convenience sample method with voluntary responces, since some people chose not to be polled.

Data set 1. Group 3 Groceries and GMO's Survey Spreadsheet (1)   [Info]
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The four questions asked were:

1. How many times a week do you grocery shop for yourself and/or family?

2. Are you familier with Genetically Modified Organism (GMO's) or Gentically Modified crops (GM crops) as a means to increase food production?  yes or no

3. For the companies who utilize GMO’s/GM Crops in their products (such asCargill, Nabisco, General Mills and Quaker for example), how often shouldthese companies list on their labels that there are GMO’s/GM Crops ingredientsin their products for food transparency?                sometimes/ never/ always

4. Approximately how much more money would you spend per grocery shoppingoccasion to purchase Organic or non-GMO/GM Crops foods in United StatesDollars (USD)?

Categorical Variables

Responces to the question " For companies who utilize GMO's/GM crops in their products, how often should these companies list that there are GMO's/GM crop ingredients in their products for food transparancy" is shown in the pie chart below:

Result 1: Pie Chart of Company disclosure   [Info]
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It is clear that the surveyed population feels strongly that companies should "always" disclose the use of GMO's/GM crops by on overwhelming majority of 82.5%. While only 16.67% felt this should occur only some of the time and less than 1% felt no disclosure was necessary.

The barplot below reveils that even if shoppers were unfamilier with GMO's/GM crops used for food production they still believed that there use should be disclosed.

Result 2: Bar Plot- Shoppers familiarity with GMO's and company disclosure.   [Info]
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Among shoppers either knowledgeable or unknowledgeable about GMO's/GM crops the most frequently selected answer was that companies should always disclose GMO's/GM crops used in food production. With the knowledgeable shoppers making up the largest portion of that catagory.

Numerical Variables

For the question "how many times a week do you grocery shop for yourself and/or your family" responses are shown in the following Histogram, Boxplot and summary statistics seen below:

 

Result 3: Histogram- The number of times the surveyor visits the grocery store per week   [Info]
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Result 4: Boxplot- See histogram- # trips to store   [Info]
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Result 5: Summary Stats- Trips to grocery store per week   [Info]
Summary statistics:
ColumnnMeanVarianceStd. dev.Std. err.MedianRangeMinMaxQ1Q3
Trips to grocery store per week1202.59166673.06715691.751330.15987383261713

The Histogram shows a right-skewed distribution to the data with the greatest number being 1 trip to the grocery store per week and the fewest being 6 trips. With regards to the measure of center, the IQR spread is 2 as well we see the median is 2, the midrange (1+7)/2 is 4, which is not an accurate measure of center for this data, therefore the mean of 2.59 is a more concrete calculation given the histograms right-skew of distribution.

The Boxplot has a unique advantage of identifying an outlier, which is shoppers that frequent the grocery store 7 times a week. I view this as acceptable data since it is feasible some shoppers choose to shop daily for the freshest product instead of shopping ahead and perserving the product for future use.

With a range of 7 trips to the grocery store per week, the standard deviation and range/4 are an exact match of 1.75 thus justifying the presence of the outlier as reasonable data.

Numerical Relationships

To determine whether there is a relationship between the questions " How many times a week do you grocery shop for yourself and/or your family" and "Approximately how much more money would you spend per grocery shoppingoccasion to purchase Organic or non-GMO/GM Crops foods in United StatesDollars (USD)? see the scatterplot below:

Result 6: Scatter Plot Trips to grocery store compaired to additional dollars spent for non-GMO foods   [Info]
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The scatterplot has a slightly negative trend which is most likely influenced by the two outliers (1 trip/ $150 additional dollars) and (2 trips/ $200 additional dollars) which both $150 and $200 is exceptionally higher than the 90% trend which is between 0-50 additional dollars and for this reason most likely has great influence on the correlation coefficient. One interesting observation is- of that above mentioned 90%, 20% of those people felt that organic or non GMO's/GM crops should be standard and therefore the population should not be charged additional for this luxury.

The correlation between trips and dollars is 0.169 as seen below:

 

Result 7: Correlation of trips and dollars   [Info]
Correlation between Trips to grocery store per week and Approximate additional dollars spent per week for no GMO foods. is:
0.16942035

In conclusion I do not find a correlation between the amount of trips to the grocery store and its infuence on the amount of additional dollars people would spend to purchase non GMO/GM crop foods as seen in the scatterplot. The results show that whether a person goes to the grocery store 1 time a week or 7 times a week the amount of additional dollars they would spend would not increase. Therefore the correlation coefficent is not statistically significant.




 

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