10. D paints My Notes Ask Your Teacher The following output is from an independe

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10. D paints My Notes Ask Your Teacher The following output is from an independent samples t-test examining whether attending nursery school (yesno)(variable: nursery) affects the science achievement of students in 12th grade (variable: achsci12). Answer the following questions by interpreting the output belovw k at the histogram and tl No Yes What is the independent variable? achscii12 What is the dependent variable? achsci12 nursery What level of measurement is the independent variable? Nominal Ratio Ordinal What level of measurement is the dependent variable? Ordinal Nominal Ratio What is the t-statistic? Make sure you interpret the results of Levene's Test first to know which line to interpret for you t-score, degrees of freedom, and p-value What are the degrees of freedom? What is the p-value for the statistic? Is this test significant or not - in other words, does attending nursery school have an impact on science achievement in 12th grade or not? in 12th No

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a)

If skewness is positive, the data are positively skewed or skewed right, meaning that the right tail of the distribution is longer than the left. If skewness is negative, the data are negatively skewed or skewed left, meaning that the left tail is longer.

If skewness = 0, the data are perfectly symmetrical. But a skewness of exactly zero is quite unlikely for real-world data, so how can you interpret the skewness number? Bulmer (1979) — a classic — suggests this rule of thumb:

Data is not normal

b) Independent: Nursery school attended

c) Dependent: achscii2

d) Nominal

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