Chapter 12: Q. 12.37 (page 499)
What are the small boxes inside the heavy lines of a contingency table called ?
The small boxes inside the heavy lines of a contingency table are called cells.
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For a -curve with degrees of freedom determine the -value that has area.
a. to its right
b. to its right.
The -table has entries for areas of and. In contrast, the -table has entries for those areas and for and Explain why the -values corresponding to these additional areas can be obtained from the existing -table but must be provided explicitly in the -table.
In each of Exercises 12.11-12.16, we have given the relative frequencies for the null hypothesis of a chi-square goodness-of-fir text and the sample size. In each case, decide whether Assumptions 1 and 2 for using that text are satisfied.
Sample size : n= 50.
Relative frequencies: 0.22 , 0.21 , 0.25 , 0.30 , 0.02.
In each of Exercises 12.18-12.23, we have provided a distribution and the observed frequencies of the values of a variable from a simple random sample of a population. In each case, use the chi-square goodness-of-fit test to decide, at the specified significance level, whether the distribution of the variable differs from the given distribution.
Distribution: 0.2, 0.4, 0.3, 0.1
Observed frequencies: 39, 78, 64, 19
Significance level = 0.05
In each of the given Exercises, we have given the number of possible values for two variables of a population. For each exercise, determine the maximum number of expected frequencies that can be less than 5 in order that Assumption 2 of Procedure 12.2 on page 506 to be satisfied. Note: The number of cells for a contingency table with m rows and n columns is mโ n.
12.73 two and two
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