Many farmers use the height of their corn on July 4 as an indicator for the entire crop. In a random sample of corn‑stalk heights on July 4 in Columbia County, the mean is 25.6 in. the standard deviation is s=0.9, and a histogram of the observations is bell‑shaped.

(Use decimal notation. Give your answers to four decimal places, if necessary.)

(a) Approximately what proportion of observations are between 24.7 and 26.5 in.?

(b) Approximately what proportion of observations are between 23.8 and 27.4 in.?

(c) Approximately what proportion of observations are less than 23.8 in.?

Approximately what proportion of observations are between 25.6 and 28.3 in.?

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To solve these problems we will use the standard normal distribution Well first standardize the valu... View the full answer