####
**Output 1. Descriptive Results**

**Explanations**

- The band inside the box is the median
- The box measures the difference between 75th and 25th percentiles
- Outliers will be in red, if existing

**Explanations**

- Normal Q–Q Plot: to compare randomly generated, independent standard normal data on the vertical axis to a standard normal population on the horizontal axis. The linearity of the points suggests that the data are normally distributed.
- Histogram: to roughly assess the probability distribution of a given variable by depicting the frequencies of observations occurring in certain ranges of values
- Density Plot: to estimate the probability density function of the data

**Normal Q–Q plot**

**Histogram**

When the number of bins is 0, plot will use the default number of bins

**Density plot**

####
**Output 2. Test Results**

**Explanations**

- P Value < 0.05, then the population of the data IS significantly different from the specified mean. (Accept the alternative hypothesis)
- P Value >= 0.05, then the population of the data IS NOT significantly different from the specified mean. (Accept the null hypothesis)

*Because P < 0.05, we concluded that the age of the lymph node-positive population was significantly different from 50 years old. Thus the general age was not 50. If we reset the specified mean to 44, we could get P > 0.05*