What Is a Histogram? — Practice problem

\text{Baby Day}

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Today (May 2) is Baby Day! It's a day to celebrate the miracle of life, or to some, the terror of life.

A cute baby. — Image by 1035352 via Pixabay (License)

In Expii Hospital, sixteen babies were born today. All the weights were recorded into the computer. Doctor Po printed out the information in order to make a histogram of the weights. Here's what was printed.

\begin{array}{|c|c|c|} \hline \textbf{Name}&\textbf{TOB}&\textbf{Weight (lbs.)}\\ \hline \text{Alexander}&9:00&7.05\\ \text{Alexandra}&9:10&7\\ \text{Ben}&10:30&6.25\\ \text{Blake}&5:45&10.62\\ \text{Buddy}&7:00&7.08\\ \text{Conrad}&2:10&7.29\\ \text{Gwyneth}&6:05&6.72\\ \text{Isabella}&3:30&5.84\\ \text{Jared}&2:25&6.62\\ \text{Joelle}&9:50&10.79\\ \text{Miriam}&10:00&8.14\\ \text{Ramona}&6:05&7.39\\ \text{Reagan}&2:40&9.95\\ \text{Rosalyn}&10:00&8.6\\ \text{Rudolph}&8:20&6.76\\ \text{Samantha}&3:00&10.5\\ \hline \end{array}

Sadly, Doctor Po forgot how to properly make a histogram. After four attempts he finally got it right. He was about to go make copies when a strong gust of wind blew in and scattered his papers. He picked up the four histograms he made.

Histogram with x-axis Weight (kg) with bins 5-6, 6-7, 7-8, 8-9, 9-10, 10-11 and y-axis Frequencies 1, 4, 5, 2, 1, 3 — Image Source: Alex Federspiel

Histogram with x-axis Weight (lbs.) with bins 5-6, 6-7, 7-8, 8-9, 9-10, 10-11 and y-axis Frequencies 1, 3, 4, 1, 5, 2 — Image Source: Alex Federspiel

Histogram with x-axis Weight (lbs.) with bins 5-6, 6-7, 7-8, 8-9, 9-10, 10-11 and y-axis Frequencies 1, 4, 5, 2, 1, 3 — Image Source: Alex Federspiel

Histogram with x-axis Weight (lbs.) with bins 5-6, 6-7, 7-8, 8-9, 9-10, 10-11 and y-axis Frequencies 4, 2, 5, 1, 1, 3 — Image Source: Alex Federspiel