A physician compared the cholesterol levels of a representative sample of Americans who ate an American diet vs a representative sample of those who followed a Mediterranean diet. Though in some studies a Mediterranean diet has been shown to be beneficial, this was one of the first studies on an American population and the physician had made no advance predictions about the outcome. The mean, standard deviation, and sample size for each group are presented below. Use an alpha level of 0.05. American Mediterranean n = 36 n = 36 M = 230 M = 190 s = 24 S = 26

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A physician conducted a study to compare cholesterol levels between two groups: Americans following a typical American diet and individuals adhering to a Mediterranean diet. This research was among the initial investigations focusing on an American population without preconceived expectations regarding the outcomes. The study examines the mean cholesterol levels, standard deviations, and sample sizes for each group, with a significance level (alpha) set at 0.05.

### Data Summary:

|               | American       | Mediterranean |
|---------------|----------------|---------------|
| Sample Size (n)   | 36             | 36            |
| Mean Cholesterol (M) | 230 mg/dL     | 190 mg/dL    |
| Standard Deviation (s) | 24             | 26            |

The table shows that both groups have the same sample size. The mean cholesterol level for the American diet group is higher than that for the Mediterranean diet group. Standard deviation is slightly larger for the Mediterranean group, indicating a bit more variability in cholesterol levels within this group.
Transcribed Image Text:A physician conducted a study to compare cholesterol levels between two groups: Americans following a typical American diet and individuals adhering to a Mediterranean diet. This research was among the initial investigations focusing on an American population without preconceived expectations regarding the outcomes. The study examines the mean cholesterol levels, standard deviations, and sample sizes for each group, with a significance level (alpha) set at 0.05. ### Data Summary: | | American | Mediterranean | |---------------|----------------|---------------| | Sample Size (n) | 36 | 36 | | Mean Cholesterol (M) | 230 mg/dL | 190 mg/dL | | Standard Deviation (s) | 24 | 26 | The table shows that both groups have the same sample size. The mean cholesterol level for the American diet group is higher than that for the Mediterranean diet group. Standard deviation is slightly larger for the Mediterranean group, indicating a bit more variability in cholesterol levels within this group.
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