Myrna wants to know about how many pairs of jeans middle school students own. She did not have time to ask all 257 middle school students, so she surveyed a random sample of 25 students. The results below display the number of pairs of jeans each surveyed student owns. 3, 4, 2, 1, 3, 1, 2, 4, 2, 3, 1, 2, 4, 2, 3, 2, 2, 6, 1, 1, 2, 4, 1, 1, 2The mean of her data is 2.36 pairs of jeans. From the given data and the calculated mean, which inference could Myrna make?
Answer
A
All middle school students own jeans.
B
The average middle school student owns around two pairs of jeans.
C
Most seventh-grade students prefer cargo pants to jeans.
D
An average middle school student owns three or more jeans.
Explanation
Myrna surveyed a random sample, and its mean is 2.36 pairs of jeans. That supports estimating that the average middle school student owns around two pairs. It does not show that every student owns jeans or reveal seventh graders’ clothing preferences, and 2.36 is not three or more.
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