Determine the Sample Size From a Histogram


Data was collected, for a sample of organic snacks. The amount of sugar in milligrams in each snack is summarized
in the histogram below. So looking at the histogram, notice along the horizontal axis we have the intervals indicating the amount of sugar and we have the frequency
along the vertical axis. So the height of each bar indicates how many snacks are in each interval, indicating how much sugar is in the snack. And we’re asked to find the sample size for the data set. To determine the sample size, we need to sum the frequencies that get indicated by
the height of each bar. For the first interval or first class, the frequency is four, which is the same for the second interval. In the third interval
the frequency is nine. In the fourth interval
the frequency is 14. In the fifth interval the frequency is 10. In the sixth and seventh intervals the frequencies are both three. So the sum of these frequencies will tell us the sample size. So n the sample size is equal to four, plus four, plus nine, plus 14 plus 10, plus three, plus three, which is equal to the 47. I hope you found this helpful.

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