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When he sorts the class’s scores on the last test, the teacher notices that exactly 12 students scored better than Clare and exactly 12 students scored worse than Clare. Does this mean that Clare’s score on the test is the median? Explain your reasoning.
The medians of the following dot plots are 6, 12, 13, and 15, but not in that order. Match each dot plot with its median.
<p>A dot plot, 0 to 20 by twos. The plot begins with 1 in increments of 1, the number of dots above each increment is 1, 1, 0, 0, 2, 2, 1, 2, 1.</p>
<p>A dot plot, 0 to 20 by twos. The dot plot begins with 10 in increments of 1, the number of dots above each increment are 2, 2, 0, 0, 0, 3, 0, 1, 1, 1.</p>
<p>A dot plot, 0 to 20 by twos. The dot plot begins with 5 in increments of 1, the number of dots above each increment are 1, 1, 0, 0, 1, 0, 2, 0, 1, 1, 3. </p>
<p>A dot plot, 0 to 20 by twos. The dot plot begins with 8 in increments of 1, the number of dots above each increment is 2, 0, 2, 0, 0, 2, 1, 0, 3.</p>
Ten sixth-grade students reported the hours of sleep they get on nights before a school day. Their responses are recorded in the dot plot.
Looking at the dot plot, Lin estimated the mean number of hours of sleep to be 8.5 hours. Noah's estimate was 7.5 hours. Diego's estimate was 6.5 hours.
Which estimate do you think is best? Explain how you know.
In one study of wild bears, researchers measured the weights, in pounds, of 143 wild bears that ranged in age from newborn to 15 years old. The data were used to make this histogram.