Tumbleweed, commonly found in the western United States, is the dried structure of certain plants that are blown by the wind. Kochia, a type of plant that turns into tumbleweed at the end of the summer, is a problem for farmers because it takes nutrients away from soil that would otherwise go to more beneficial plants. Scientists are concerned that kochia plants are becoming resistant to the most commonly used herbicide, glyphosate. In 2014, 19.7 percent of 61 randomly selected kochia plants were resistant to glyphosate. In 2017, 38.5 percent of 52 randomly selected kochia plants were resistant to glyphosate. Do the data provide convincing statistical evidence, at the level of a = 0.05, that there has been an increase in the proportion of all kochia plants that are resistant to glyphosate?
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
Tumbleweed, commonly found in the western United States, is the dried structure of certain plants that are
blown by the wind. Kochia, a type of plant that turns into tumbleweed at the end of the summer, is a problem for
farmers because it takes nutrients away from soil that would otherwise go to more beneficial plants. Scientists
are concerned that kochia plants are becoming resistant to the most commonly used herbicide, glyphosate. In
2014, 19.7 percent of 61 randomly selected kochia plants were resistant to glyphosate. In 2017, 38.5 percent of
52 randomly selected kochia plants were resistant to glyphosate. Do the data provide convincing statistical evidence, at the level of a = 0.05, that there has been an increase in the proportion of all kochia plants that are
resistant to glyphosate?
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