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the following scenario applies to the remaining exercises in given exercise we presented a two-way table of counts for
the goal is to estimate the average length of the n strings in the bag the instructor is holdling the sampling will be
selection by random numbers a lay the strings out on a table and number them from 1 tonb select 10 strings by choosing
data analysisa construct a dot plot or stem plot of the averages from the sampling by touchb construct a dot plot or
look at a map of your state or a neighboring state that has the lakes marked in a visible way an environmental
the sampling by touch method is said to suffer from selection bias in that the longer strings get chosen more often
suggest other situations in which selection bias could be important discuss how one might get unbiased data in these
collecting the datausing the rectangle sheet from the earlier random rectangles activity and a random number table draw
if you have a choice between two estimates the sample mean from a sample of size 5 and a sample mean from a sample of
in practice people do not know the population mean like you did in step 2 and do not have several estimates to get a
a friend quite upset calls you because she had a dream that a building had been bombed and she was helping to search
tomorrow morning when you first arise pick a three-digit number anything from 000 to 999 you can choose randomly or
a psychological test identifies people as being one of eight types for instance type 1 is rationalist and applies to 15
refer to given exercise a psychologist has noticed that teachers and rationalists get along particularly well with each
new spark plugs have just been installed in a small airplane with a four-cylinder engine for each spark plug the
refer to exercises 1 2 and 3 given that a randomly chosen student receives an a grade what is the probability that he
the 2007 working group on california earthquake probabilities reported that the likelihood of an earthquake in
recall that the empirical rule in stated that for bell-shaped distributions about 68 of the values fall within one
according to the us census bureau only 35 percent of the foreign-born people in the united states in 1997 were
an airline has noticed that 40 of its customers who buy tickets dont take advantage of advance-purchase fares and the
refer to the part of given example in which two students are drawn without replacement from a class of 30 students in
in a test for esp a picture is randomly selected from four possible choices and hidden away participants are asked to
five fair dice were tossed and the sum of the resulting tosses was recorded this process was repeated 10000 times using