The mean and standard deviation of the sample data collected on continuous variable Y are −0.5 and 0.5, respectively. The following table shows the relative frequencies of the data in the given intervals.

Interval Relative Frequency
−2.0≤y<−1.5 0.25
−1.5≤y<−1.0 0.15
−1.0≤y<−0.5 0.10
−0.5≤y<0 0.10
0≤y<0.5 0.15
0.5≤y<1.0 0.25
Based on the table, is it appropriate to use the normal model to approximate the population distribution?

Since gaining independence from spain and portugal, many latin american nations have faced similar struggles. choose a common issue discussed in this lesson, such as the influence of military dictatorships, struggles with democracy, or continuing revolutions and coups. in a short paragraph, discuss how that struggle has affected two latin american nations.

Researchers pose the question: can shoe size be predicted from a woman's height? a random sample of 18 females and their shoe size versus height (in inches) gives the regression results shown in the table. predictor coeff se coeff t ratio p-value constant -45.74 32.58 -2.57 0.147 height 0.5943 0.2984 1.99 0.042 s = 3.2178 r-sq. = 18.9% r-sq. (adj) = 12.4% is there statistical evidence of a linear relationship between shoe size and height? no, because r2, the coefficient of determination, is too small no, because 0.147 is above any reasonable significance level yes, there is evidence at the 5% significance level yes, because, by any reasonable observation, taller women tend to have a larger shoe size

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