significance level handedness

The phenomenon of handedness has been extensively studied in human populations. The percentages of adults who are right-handed, left-handed, and ambidextrous are well documented. What is not so well-known is that a similar phenomenon is present in other (cuter, fuzzier) animals. Dogs, for example, can be either right-pawed or left-pawed. In a random sample of 200 beagles, it was found that 55 were left-pawed and in a random sample of 200 collies 40 were left-pawed. Can we conclude that there is a statistically significant difference in the proportion of left-pawed beagles and collies? Use a significance level of a = 0.05.

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Originally Posted by wik_chick88

The phenomenon of handedness has been extensively studied in human populations. The percentages of adults who are right-handed, left-handed, and ambidextrous are well documented. What is not so well-known is that a similar phenomenon is present in other (cuter, fuzzier) animals. Dogs, for example, can be either right-pawed or left-pawed. In a random sample of 200 beagles, it was found that 55 were left-pawed and in a random sample of 200 collies 40 were left-pawed. Can we conclude that there is a statistically significant difference in the proportion of left-pawed beagles and collies? Use a significance level of a = 0.05.

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Have you tried using the t-test? Student's t-test - Wikipedia, the free encyclopedia

i attempted to use the t-test using 1 for left-handedness and 0 for right-handedness so the means are: X1 (beagles) = 0.275 and X2 (collies) = 0.2. i got t = 0.082402346 is this right? and what does this mean for the question ie. a = 0.05??