As the degrees of freedom increase, the t distribution approaches the "normal distribution".
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What is normal distribution?</h3>
For independent, random variables, the normal distribution, often referred as the Gaussian distribution, represents the most significant probability distribution in statistics. Most people are familiar with the bell-shaped curve found in statistical reports.
Some key features regarding the normal distribution are-
- A normal distribution is a probability distribution that is symmetrical around the mean, with most observations clustering around the central peak and probabilities tapering off equally in both directions.
- Data points in both distribution tails are similarly uncommon.
- Whereas the normal distribution appears symmetrical, it is not the only symmetrical distribution.
- The Student's t, Cauchy, & logistic distributions, for example, are symmetric.
- The normal distribution, like any other probability distribution, defines the how values of a variable is distributed.
- Because it accurately captures the range of values for many natural occurrences, it's the most essential probability distribution in statistics.
To know more about the normal distribution, here
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Robert de La Salle not right
Although all of the options are important factors to determine social movility, I beleive that one amongst them has more impact. Social class at birth makes a significant difference. It is like a stating point in life, some people start with some advantages (like being born in a wealthy and educated family) and other with disadvantages (being born in a poor family with no access to education).
Although race or ethnicity and gender are important too, they can have a stronger or weaker impact depending of your social class. A person that forms part of a minority, for example, african american, will have a very different life depending on the economic situation of the family.
It is true that hard work and education is also needed but, again, social class can lead you to a more familiar and direct contact with them.
ANSWER: It should be reported in a psychological journal using this formate of the APA style.
F(3, 26) = 2.91, P < .05
Explanation: APA which means American Psychological Association, has a style of reporting an experimental results in a their psychological journal.
To report the result of a one way ANOVA, one should be subtracted from the level of the independent variable, and the number of the levels should be subtracted from the number of subject in each group. The function of the values gotten is always equal to the result obtained at F. Since the alpha level is 0.05 that means P is less than 0.05.
30 - 4 = 26
4 - 1 = 3
Therefore;
F(3, 26) = 2.91
P < 0.05.
