Ch2.WS - #4 • Two histograms are sketched below One shows...

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Practice Questions Histogram
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#1 • The histogram below shows the distribution  of final scores in a certain class. • (a) which block represents the people who  scored between 60 and 80? • (b) Ten percent scored between 20 and 40.  About what percentage scored between 40 and  60? • (c) About what percentage scored over 60? 20 40 60 80 100 0 1 2 3 4 D C B A
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#2 • An investigator collects data on  daily wage rates for 3 groups of  workers. Workers in group B earn  about twice as much as those in group  A; workers in group C earn about Baht  100 a day more than those in group A.  Which histogram belongs to which  group?  (i) (ii) (iii)
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#3 • A histogram of pocket-money used by EBA  students in a week is shown above. No  student used over Baht1,000 per month. The  block over the class interval 200-500 is  missing. How tall must it be? % per Baht 100 0 0 10 20 1 2 3 4 5 6 7 8 9 10 Pocket Money (‘00s Baht)
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Unformatted text preview: #4 • Two histograms are sketched below. One shows the distribution of age at death from natural causes (heart disease, cancer, etc) and the other shows age of death from trauma (accident, murder, suicide, etc). Which is which, and why? (i) (ii) • The above shows a block of family income in a certain town. About what percent of the families in the city had incomes between $15,000 and $25,000? % per Baht 2,000 1 3 2 Income (thousands of Baht) 15 25 #5 #6 • Someone has sketched a histogram for the weights of a sample of people using the density scale. Briefly explain what is wrong. Try Drawing a Histogram • Data from on-line survey on hours spent by teenagers on gaming per day. • Try drawing the cumulative relative frequency graph (ogive) as well....
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This note was uploaded on 03/14/2010 for the course ECON Statistics taught by Professor Yy during the Spring '10 term at Seoul National.

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Ch2.WS - #4 • Two histograms are sketched below One shows...

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