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Statistics??
I've been trying some practice problems for my test, but I can't seem to understand it. Help please?
1. What percentage of the general US population have bachelor's degrees? The Statistical Abstract of the United States (120th edition), gives the percentage of bachelor's degrees by state. For convenience, the data are sorted in increasing order.
17, 18, 18, 18, 19, 20, 20, 20, 21, 21
21, 21, 22, 22, 22, 22, 22, 22, 23, 23
24, 24, 24, 24, 24, 24, 24, 24, 25, 26
26, 26, 26, 26, 26, 27, 27, 27, 27, 27
28, 28, 29, 31, 31, 32, 32, 34, 35, 38
2.Use the data from number 1 to answer this question: If South Carolina has a bachelor degree percentage rate of about 26%, into what quartile does it fall?
3.Students from a statistics class were asked to record their height in inches. The heights ( as recorded) were:
65, 72, 68, 64, 60, 55, 73, 71, 52, 63, 61, 74, 69, 67, 74, 50, 4, 75, 67, 62, 66, 80, 64, 65
Find five number summary, then List any suspected outliers. What might be some explanations for the outlier(s)?
a. Can not be determined from data given.
b. Low = 4, Q1 = 61.5, Median = 65.5, Q3 = 71.5, High = 80.
c. Low = 4, Q1 = 51.5, Median = 74.5, Q3 = 77.5, High = 80.
d. Low = 4, Q1 = 62.5, Median = 64.5, Q3 = 70.5, High = 80.
4. Use the data from #3: Multiple the IQR (interquartile range) by 1.5 to find the lower and upper limits.
Choose one answer.
a. lower limit = 48.5, upper limit = 88.5
b. lower limit = 46.5, upper limit = 86.5
c. Can not be determined from data given.
d. lower limit = 40.5, upper limit = 80.5
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