Using Locals to Store Results (Macros)

Using eth_allrounds_final.dta,

1. Summarize yield_kg and store the mean and standard deviation from this command in locals named mean_yield and sd_yield using r(mean) and r(sd). Use these locals to create a standardized yield variable called yield_std. Recall from your stats classes, to standardize a variable you subtract the mean value from the variable and then divide the difference by the standard deviation. What is the mean and standard deviation of yield_std?

2. Use the display command and your locals to print the following sentence “Mean yield on Ethiopian plots is `mean_yield' kg with standard deviation of `sd_yield' kg.”

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