Standard +0.3 This is a straightforward chi-squared test of independence requiring students to state hypotheses, identify degrees of freedom (2×2=4 for a 2×3 table), compare the given test statistic (11.09) to the critical value (9.488 at 5% level), and draw a conclusion. All computational work is done; students only need to apply standard procedure with no problem-solving or novel insight required, making it slightly easier than average.
A random sample of the invoices, for books purchased by the customers of a large bookshop, was classified by book cover (hardback, paperback) and type of book (novel, textbook, general interest). As part of the analysis of these invoices, an approximate \(\chi^2\) statistic was calculated and found to be 11.09.
Assuming that there was no need to amalgamate any of the classifications, carry out an appropriate test to determine whether or not there was any association between book cover and type of book. State your hypotheses clearly and use a 5% level of significance. [6]
A random sample of the invoices, for books purchased by the customers of a large bookshop, was classified by book cover (hardback, paperback) and type of book (novel, textbook, general interest). As part of the analysis of these invoices, an approximate $\chi^2$ statistic was calculated and found to be 11.09.
Assuming that there was no need to amalgamate any of the classifications, carry out an appropriate test to determine whether or not there was any association between book cover and type of book. State your hypotheses clearly and use a 5% level of significance. [6]
\hfill \mbox{\textit{Edexcel S3 Q2 [6]}}