Questions: Kemala is a marine biologist studying the breeding habits of an exotic species of sea turtle. Last year she observed the number of pregnant mother turtles at each beach on an isolated island in the Pacific. The histogram below summarizes the data. Use the histogram to answer each of the questions. (a) One class is the least frequent. How many beaches are in this class? (b) What is the class width? (c) How many beaches had 11 or more pregnant turtles?

Kemala is a marine biologist studying the breeding habits of an exotic species of sea turtle. Last year she observed the number of pregnant mother turtles at each beach on an isolated island in the Pacific. The histogram below summarizes the data. Use the histogram to answer each of the questions. (a) One class is the least frequent. How many beaches are in this class? (b) What is the class width? (c) How many beaches had 11 or more pregnant turtles?
Transcript text: Kemala is a marine biologist studying the breeding habits of an exotic species of sea turtle. Last year she observed the number of pregnant mother turtles at each beach on an isolated island in the Pacific. The histogram below summarizes the data. Use the histogram to answer each of the questions. (a) One class is the least frequent. How many beaches are in this class? (b) What is the class width? (c) How many beaches had 11 or more pregnant turtles?
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Solution

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Solution Steps

Step 1: Find the least frequent class

The bar with the smallest height corresponds to the least frequent class. This is the bar for 5 to 7 pregnant turtles. Its height is 2.

Step 2: Calculate the class width

The class width is the difference between the upper and lower bounds of any class. For example, the class "2 to 4" has a width of 4 - 2 = 2. The class "5 to 7" has a width of 7 - 5 = 2. All the classes have the same width.

Step 3: Find the number of beaches with 11 or more pregnant turtles

The classes representing 11 or more pregnant turtles are "11 to 13" and "14 to 16". The heights of these bars are 4 and 7 respectively. The sum of these heights gives the total number of beaches.

Final Answer:

(a) 2 (b) 3 (c) 11

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