Professor James gave the same test to his three sections of statistics students. On the 35-question test, the highest score was 32 and the lowest was 15. Based on the information displayed in the boxplots above, which of the following statements is true? Section 1 has the smallest interquartile range. The lowest score in section 2 is higher than the highest score in either of the other sections. Section 2 has the smallest range of scores. The top 25% of scores in section 2 are lower than the highest score in section 3. At least 50% of the scores in section 3 are higher than all of the scores in section 1.

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.