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Question: A mail-order firm was considering a new software package that provided information on products (availability, history, cost, and so forth). To test the software, the next 17 new employees were randomly assigned to use the old or the new software. After training, each employee completed a search report on 40 products. Analyze the data, which are in minutes, and write a conclusion about the new software package.
New package Old package
4.3 6.3
4.7 5.8
6.4 7.2
5.2 8.1
3.9 6.3
5.8 7.5
5.2 6.0
5.5 5.6
4.9
How was he able to predict the results of the Literary Digest survey? According to Freedman et al. (1991, p. 308), "he just chose 3,000 people at random from the same lists the Digest was going to use, and mailed them all a postcard asking them ho..
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consider the following data set and fill in the blanks in the statements below1.5 2.9 4.9 6.5 6.9 7.0 7.0 7.6 7.7
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In standard normal distribution standard deviation is always ___.
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