The mean yield is approximately 4.69 and the standard deviation is approximately 1.81.

Would you like more details or have any questions?

Here are some related questions to consider:

1. How does the distribution of yields compare to a normal distribution?
2. How does the mean yield compare to the median yield?
3. What percentage of yields fall within one standard deviation of the mean?
4. How might the variance in yield affect investment decisions?
5. Can we explore the correlation between yield and years to maturity?

Tip: The standard deviation tells us how much the yields deviate from the average, helping to assess the risk or variability in the data.