Solve the Problem A)No the Distribution Is J-Shaped

question 25

Multiple Choice

Solve the problem.
-Frequency data were reported for the ages of women who became mothers during one year in a selected U.S. city. The age distribution is given in the table. Obtain a relative-frequency histogram
Of these data and determine whether the ages are approximately normally distributed. $$\begin{array} { c | c } \begin{array} { c } \text { Age } \\\text { (yrs) }\end{array} & \text { Frequency } \\\hline \text { 15-under 20 } & 101 \\\text { 20-under 25 } & 270 \\\text { 25-under 30 } & 285 \\30 \text {-under 35 } & 479 \\35 \text {-under 40 } & 867 \\40 \text {-under 45 } & 1021 \\45 \text {-under 50 } & 225 \\50 \text {-under 55 } & 56\end{array}$$

• A)No. The distribution is J-shaped.
• B)No. The distribution is left-skewed.
• C)Yes. The distribution is bell-shaped.
• D)No. The distribution is right-skewed.

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Definitions:

Multiregional Hypothesis

The hypothesis that modern humans originated through a process of simultaneous local transition from Homo erectus to Homo sapiens throughout the inhabited world.

Recent African Origins Hypothesis

The hypothesis that modern humans are all derived from one single population of archaic Homo sapiens who migrated out of Africa after 100,000 years ago, replacing all other archaic forms due to their superior cultural capabilities; also known as the Eve hypothesis or the out of Africa hypothesis.

Homo Sapiens Idaltu

An extinct subspecies of Homo sapiens that lived approximately 160,000 years ago, discovered in Ethiopia.

Recent African Origins Hypothesis

A scientific theory proposing that modern humans originated in Africa and migrated outwards, replacing local populations of archaic humans approximately 60,000 to 70,000 years ago.