Consider a Study Testing Whether Birds Were Equally Likely to Rest

question 36

Multiple Choice

Consider a study testing whether birds were equally likely to rest on each streetlight. Researchers surveyed 30 randomly chosen streetlights in a city known to have many birds and counted the number of birds resting on each streetlight. Data on the number of birds seen on the lights are shown. (Note: No lights had more than three birds.) Assuming a Poisson process, what is the expected number of streetlights without any birds?
?
$\begin{array}{|cc|}\hline \begin{array}{l}\text { Number } \\\underline {\text { birds }}\end{array} & \begin{array}{l}\text { Number } \\\underline {\text { of lights }}\end{array} \\0 & 2 \\1 & 16 \\2 & 10 \\\geq 3 & 2 \\\hline\end{array}$

• A) 3.4
• B) 5.4
• C) 7.4
• D) 9.4

---

Definitions:

Prospective Memory

The aspect of memory that involves the ability to remember to perform an action at a future point in time.

Temporally Dated

Specific to a particular time or associated with a particular period.

Previously Learned

Refers to information or skills that have been acquired in the past and can influence or be recalled in current situations.

Schemas

Cognitive frameworks or concepts that help individuals organize and interpret information.