Chapter 11: Q.36 (page 656)
The degree of freedom is.
Given data:
The number of columns is and the number of rows is
To calculate the degree of freedom is
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What can you conclude at the significance level ?
A sample of students is taken. Of the students surveyed,were music students, while were not. Ninetyseven were on the honor roll, while were not. If we assume being a music student and being on the honor roll are independent events, what is the expected number of music students who are also on the honor roll?
The City of South Lake Tahoe, CA, has an Asian population of people, out of a total population of . Suppose that a survey of self-reported Asians in the Manhattan, NY, area yielded the data in Table 11.38. Conduct a goodness-of-fit test to determine if the self-reported sub-groups of Asians in the Manhattan area fit that of the Lake Tahoe area.
A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27
The actual distribution for a class of 20 is in table 11.28
State the null and alternative hypothesis
Suppose an airline claims that its flights are consistently on time with an average delay of at most minutes. It claims that the average delay is so consistent that the variance is no more than minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next flights. The average delay for those flights is minutes with a standard deviation of minutes.
If an additional test were done on the claim of the average delay, which distribution would you use?
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