in a test of the effectiveness of garlic for lowering cholesterol, 48 subjects were treated with garlic in a processed tablet form. cholesterol levels were measured before and after the treatment. the changes in their levels of ldl cholesterol (in mg/dl) have a mean of 3.2 and a standard deviation of 18.5
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To calculate the effectiveness of garlic for lowering cholesterol, we can analyze the changes in LDL cholesterol levels before and after the treatment.
Mean (average): The mean of the changes in LDL cholesterol levels is given as 3.2 mg/dl. This means that, on average, the subjects experienced a positive change in LDL cholesterol levels after the garlic treatment.
Standard Deviation: The standard deviation of the changes in LDL cholesterol levels is given as 18.5 mg/dl. This measure tells us the variability in the data set. In this case, the standard deviation is relatively high, indicating that the changes in LDL cholesterol levels after the garlic treatment varied quite a bit among the subjects.
To further analyze the effectiveness of garlic for lowering cholesterol, we can calculate other statistical measures. From the information given, it seems that we have the necessary data to conduct inferential statistics, such as t-tests or confidence intervals, to determine if the observed mean change in LDL cholesterol levels of 3.2 mg/dl is statistically significant.
However, it is important to note that this analysis alone does not provide conclusive evidence on the effectiveness of garlic for lowering cholesterol. To draw stronger conclusions, it is necessary to consider additional factors, perform controlled studies, and analyze data from a larger sample.