Find the chi-squared statistic and the number of degrees of freedom.

Last year at this time, your firm’s incoming telephone calls followed the percentages shown in Table 17.4.2. a. Find the percentages for the first day of this month and compare them to last year’s percentages for this month. b. Find the expected number of calls of each type for the first day of this month, assuming the population percentages are given by last year’s total for the month. c. Find the chi-squared statistic and the number of degrees of freedom. d. Report the results of the chi-squared test at the 5% level. e. Summarize what the chi-squared test has told you about any change in the pattern of calls compared to last year at this time.


 

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