Contamination of various food products is an ongoingproblem all over the world. The article “Prevalence andQuantitative Detection of Salmonella in Retail RawChicken in Shaanxi, China” (J. of Food Production,2013) reported the following data on the occurrence ofsalmonella in chicken of three different types: (1) supermarketchilled, (2) supermarket frozen, and (3) wetmarket fresh slaughtered.Sample Size# SalmonellaPositive Samples1. 60 27Type 2. 60 323. 120 45Does it appear that the incidence rate of salmonellaoccurrence depends on the type of chicken? State andtest the appropriate hypotheses using a significance levelof .05.
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Contamination of various food products is an ongoing
problem all over the world. The article “Prevalence and
Quantitative Detection of Salmonella in Retail Raw
Chicken in Shaanxi, China” (J. of Food Production,
2013) reported the following data on the occurrence of
salmonella in chicken of three different types: (1) supermarket
chilled, (2) supermarket frozen, and (3) wet
market fresh slaughtered.
Sample Size
# Salmonella
Positive Samples
1. 60 27
Type 2. 60 32
3. 120 45
Does it appear that the incidence rate of salmonella
occurrence depends on the type of chicken? State and
test the appropriate hypotheses using a significance level
of .05.
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