ds21: Data Set 21: Coin Weights (grams)

Description Format Source

Description

The "pre-1983 pennies" were made after the Indian and wheat pennies, and they are 97% copper and 3% zinc. The "post-1983 pennies" are 3% copper and 97% zinc. The "pre-1964 silver quarters" are 90% silver and 10% copper. The 'post-1964 quarters" are made with a copper-nickel alloy.

Format

A data frame with 40 rows and 8 variables

Source

Triola, M. 2014. Elementary Statistics, 12th ed. Boston, MA: Pearson.


ngay/kustats documentation built on May 23, 2019, 4:41 p.m.