What is the difference between statistics and statistic? statistics: the collection of methods used in planning
an experiment, collect data and analyze it. (a discipline) statistic: a numerical value, characteristic of a sample
Would you trust a 1998 poll to be accurate when saying that Clinton needs
to resign if you find out that the poll is collected by people calling
in response to a newspaper article? Why or why not?
Biased: most of the people are fed up with and do not
want to have anything to do with Clinton....
What are the two catagories of data starting with the letter q?
Quantitative, Qualitative
Arrange in order from highest to lowest the four levels of measurement.
Ratio, Interval, Ordinal, Nominal
The first edition of a textbook contained 600 exercises. For the revised
edition, the author removed 50 of the original exercises and added 350
new exercises. Complete each of the following statements.
There are 900 exercises in the revised ed.
600 - 50 + 350 = 900
There are 50% more exercises in the revised ed.
than the 1st ed.
300/600 * (100) = 50%
Assume 25% of the deer population is infected with TB. Suppose the total
population is reduced by 10% by recurring annual methods. If the initial
population was 100,000, how many infected deer are left? (Assume that the
reduction methods operate independantly of infection.)
22500 because: 100,000(.25)(.1) = 2500, then
25000 - 2500 = 22500
If 0°C = 32°F and 100°C = 212°F, find the number that represents
the same temperature on both scales.
-40; F = (9/5)C + 32, You want F = C ,
so F = (9/5)F + 32 and 5F = 9F + 160 or 4F=-160, thus F = C at -40