Bambach et al, (2013) analyzed data on all bicycle accidents involving collision

Question

Bambach et al, (2013) analyzed data on all bicycle accidents involving collisions with motor vehicles in New South Wales, Australia during 2001-2009. The following is 2 Times 2 frequency table for two categorical variables. The assumptions for this test are: The sample size is greater than 90 and the two variables are categorical SRS and every cell frequency is greater than 5 The population follows normal distribution and n greater tran30 All of above2. The null hypothesis and the alternative hypothesis are H0 : there is no there is are association H2: there is an association H0: there is an association H : there is no association H0 : both variables are categocal H0: both variables are quantitative The test statistic value X1 is. The p-value is At significance level is equal to 0.05, see reject the null hypothesis and conclude that there is an association we fail to reject the null hypothesis and corded that there is an association bath hypotheses are not correct hypotheses are correct

Explanation / Answer

1) d. all the above

2) a. H0: there is no association

       Ha: there is assofication

3) chi square = 112.68 (calculation shown below)

4) p value = 0.0000

5) We reject null hypothesis and conclude there is association.

372
481.93
( 25.07) 4715
4605.07
( 2.62) 5087 267
157.07
( 76.93) 1391
1500.93
( 8.05) 1658 639 6106 6745

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