Chapter 11: Q.34 (page 656)
State the hypotheses.
:
:
Short Answer
Smoking levels per day have no effect on self-reported ethnicity.
: The self-reported ethnicity is influenced by daily smoking levels.
Chapter 11: Q.34 (page 656)
State the hypotheses.
:
:
Smoking levels per day have no effect on self-reported ethnicity.
: The self-reported ethnicity is influenced by daily smoking levels.
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Get started for freeThe number of births per woman in China is down from in . This fertility rate has been attributed to the law passed in restricting births to one per woman. Suppose that a group of students studied whether or not the standard deviation of births per woman was greater than . They asked women across China the number of births they had had. The results are shown in Table. Does the students’ survey indicate that the standard deviation is greater than ?
Decide whether the following statements are true or false:
As the number of degrees of freedom increases, the graph of the chi-square distribution looks more and more symmetrical.
Is it more likely the in the graph?
If , the chi-square distribution has a shape that reminds us of the exponential.
The expected percentage of the number of pets students have in their homes is distributed (this is the given distribution for the student population of the United States) as in Table 11.12.
A random sample of students from the Eastern United States resulted in the data in Table 11.13.
At the significance level, does it appear that the distribution “number of pets” of students in the Eastern United States is different from the distribution for the United States student population as a whole? What is the p-value?
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