Let\'s look at college students. The following table gives us data to examine th
ID: 3124740 • Letter: L
Question
Let's look at college students. The following table gives us data to examine the relation between age and full-time or part-time status. The numbers in the table are expressed as thousands of college students.
(a) What is the estimate of the number of full-time college students aged 15 to 19?
thousands of college students
(b) Give the joint distribution of age and status for this table. (Round your answers to four decimal places.)
(c) What is the marginal distribution of age? (Round your answers to four decimal places.)
Display the results graphically.
(d) What is the marginal distribution of status? (Round your answers to four decimal places.)
Display the results graphically.
Explanation / Answer
A)
According to the table,
3303 [ANSWER]
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B)
There are 16376 thousand total participants here, so we divide all entries by 16376 to get the joint distrbution:
C)
Adding up each row, we have
The correct graph is the one on the LOWER RIGHT.
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d)
Adding up the columns,
The correct graph is the one on the UPPER LEFT. [ANSWER]
Age Full-time Part-time 15-19 0.20169761 0.024243 20-24 0.31869809 0.073217 25-34 0.10613092 0.106253 35 and over 0.04659257 0.123168Related Questions
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