World Civilization Since 1660 - Chapter 1 The Foundations of Complex Societies

Two companies make batteries for cell phone manufacturers. One company claims a mean life span of 2 years, while the other company claims a mean life span of 2.5 years (assuming average use of minutes/month for the cell phone):

a) Explicate why you would also like to know the standard deviations of the battery life spans before deciding which brand to buy.

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question

In a three-digit lottery, each of the three digits is supposed to have the same probability of occurrence (counting initial blanks as zeros, e.g., 32 is treated as 032). The table shows the frequency of occurrence of each digit for 90 consecutive daily three-digit drawings. (a) Make a bar chart and describe it. (b) Calculate expected frequencies for each class. (c) Perform the chi-square test for a uniform distribution. At $\alpha = .05$ , can you reject the hypothesis that the digits are from a uniform population?

Digit	Frequency
0	33
1	17
2	25
3	30
4	31
5	28
6	24
7	25
8	32
9	25
Total	270

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psychology

What might be an example of behavior and consequences in a behavioral situation?

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us government

Narrative Think about the economic goals you explored in this lesson. Which economic goals and social values are most important to you? Which federal expenditures do you think are most closely related to those values? Write a paragraph explaining your point of view.

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