A marine biology research team conducted a study to investigate whether there is an association between dolphin species (Delphinus delphis vs Tursiops truncatus) and their preferred foraging location. The observed frequencies are recorded in Table 1.

Table 1: Observed foraging locations of dolphin species

Location	Common Dolphin	Bottlenose Dolphin
Inshore	24	11
Offshore	12	28

A Chi-square test of independence was performed on the data, yielding a calculated test statistic of $χ2=5.42\chi^2 = 5.42$ .

Table 2: Critical values of Chi-square ( $χ2\chi^2$ )

df	0.10	0.05	0.025	0.01
1	2.706	3.841	5.024	6.635
2	4.605	5.991	7.378	9.210

Using the tables above, interpret the results of this study. Justify your answer.

Table 1: Observed foraging locations of dolphin species

Location	Common Dolphin	Bottlenose Dolphin
Inshore	24	11
Offshore	12	28

A Chi-square test of independence was performed on the data, yielding a calculated test statistic of $χ2=5.42\chi^2 = 5.42$ .

Table 2: Critical values of Chi-square ( $χ2\chi^2$ )

df	0.10	0.05	0.025	0.01
1	2.706	3.841	5.024	6.635
2	4.605	5.991	7.378	9.210

Using the tables above, interpret the results of this study. Justify your answer.

Inferential testing (A-level only)

Question 59

Table 1: Observed foraging locations of dolphin species

Table 2: Critical values of Chi-square ( $χ2\chi^2$ )

Markscheme

Inferential testing (A-level only)

Question 59

Table 1: Observed foraging locations of dolphin species

Table 2: Critical values of Chi-square ( $χ2\chi^2$ )

Markscheme

Inferential testing (A-level only)

Question 59

Table 1: Observed foraging locations of dolphin species

Table 2: Critical values of Chi-square (χ2\chi^2χ2)

Inferential testing (A-level only) Questions

Inferential testing (A-level only)

Question 59

Table 1: Observed foraging locations of dolphin species

Table 2: Critical values of Chi-square (χ2\chi^2χ2)

Inferential testing (A-level only) Questions

Table 2: Critical values of Chi-square ( $χ2\chi^2$ )

Table 2: Critical values of Chi-square ( $χ2\chi^2$ )