Dr. Sattler wants to determine if the sex-ratio of adult Velociraptors on Isla Nublar is 1:1. This seems sensible if male and females have about the same chances of being born and surviving to adulthood. It is impossible to census every animal on the island, so she conducts an aerial survey of adult Velociraptors. She counts 135 males and 165 females. The sex ratio of the animals in her sample is clearly different from 1:1, but can she infer that this difference is statistically significant?

Variable(s)	Sex
Type of Variable (sex)	Dependent
Type of Data (sex)	Categorical
Null Hypothesis	Probabilities equal to the hypothesized sex ratio of 0.5 to 0.5.
Alternative Hypothesis	Probabilities not equal to the hypothesized sex ration of 0.5 to 0.5.
Correct Statistical Test	Distribution analysis

Distributions Sex 4 Frequencies Test Probabilities Level Count Prob Level Estim Prob Hypoth Prob Female 165 0.55000 Female 0.55000 0.5 Male 135 0.45000 Male 0.45000 0.5 Total 300 1.00000 Test ChiSquare DF Prob> Chisq N Missing 1 Likelihood Ratio 3.0050 0.0830 2 Levels Female Male Pearson 3.0000 0.0833 Method: Fix hypothesized values, rescale omitted