Exercise 7 (set 1)
1. What are three versions of the null hypothesis?
The three versions of the null hypothesis are: (1) “the observed difference was created by sampling error”, (2) “there is no true difference between the two groups” and (3) “the true difference between the two groups is zero.” (Barker, 56-57)
2. Is the null hypothesis typically stated in social scientific research? Why/why not?
The null hypothesis is not usually stated in social scientific research. Researchers rarely state the null hypothesis in their academic journals because they “assume that readers know the sole purpose of a significance test is to test a null hypothesis.” (Barker 57) Instead of reporting the null hypothesis, researches “report which differences were tested for significance, which significance test they used, and which differences were found to be statistically significant.” (Barker 57) Additionally, researchers are …show more content…
Men of “first rank in social terms,” no matter their actual birth order, scored equal to the firstborn men. Social rank determines IQ scores, not birth order. Additionally, the graph shows that second and third born men who were treated as if they were the first born have similar IQ levels as actual first born men. The siblings that had two deaths of previous siblings had the highest confidence interval. Having such a high confidence interval would mean that the sub sample would have been most likely very small. Merely by asking ourselves how likely it would be that a conscript had two older siblings die before the age of one would most likely be a very small number of men. Thus with a small sub sample, this would explain for the larger confidence interval, which also makes the research finding a little less accurate, but still
1. What are three versions of the null hypothesis?
The three versions of the null hypothesis are: (1) “the observed difference was created by sampling error”, (2) “there is no true difference between the two groups” and (3) “the true difference between the two groups is zero.” (Barker, 56-57)
2. Is the null hypothesis typically stated in social scientific research? Why/why not?
The null hypothesis is not usually stated in social scientific research. Researchers rarely state the null hypothesis in their academic journals because they “assume that readers know the sole purpose of a significance test is to test a null hypothesis.” (Barker 57) Instead of reporting the null hypothesis, researches “report which differences were tested for significance, which significance test they used, and which differences were found to be statistically significant.” (Barker 57) Additionally, researchers are …show more content…
Men of “first rank in social terms,” no matter their actual birth order, scored equal to the firstborn men. Social rank determines IQ scores, not birth order. Additionally, the graph shows that second and third born men who were treated as if they were the first born have similar IQ levels as actual first born men. The siblings that had two deaths of previous siblings had the highest confidence interval. Having such a high confidence interval would mean that the sub sample would have been most likely very small. Merely by asking ourselves how likely it would be that a conscript had two older siblings die before the age of one would most likely be a very small number of men. Thus with a small sub sample, this would explain for the larger confidence interval, which also makes the research finding a little less accurate, but still