Statistics Final

Froggy Jumps

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Fast practice on core stats concepts.

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Jett Eckel

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Statistics Final


Froggy Jumps Statistics FinalVersión en línea Fast practice on core stats concepts. por Jett Eckel 1 What is the formula for Pearson's r used to measure linear relationships? a r = mean(X) + mean(Y) b r = variance(X) / variance(Y) c r = covariance(X,Y) / (SD(X) * SD(Y)) 2 Which unit defines the proportion of variance explained in regression? a P-value b R² (R-squared) c Standard error 3 In a normal distribution, what are the mean and standard deviation of the standard normal curve? a Mean 0, SD 1 b Mean 1, SD 0 c Mean 0, SD 2 4 What does the central limit theorem say about sampling distributions as n grows? a They become approximately normal b They become Exponential c They become uniform 5 Which visualization best shows the distribution of a quantitative variable? a Bar chart b Pie chart c Histogram 6 Which measure is most appropriate for central tendency with skewed data? a Mode b Mean c Median 7 What does the p-value represent in NHST? a Probability H0 is true b Probability of sample mean c Probability of obtaining results as extreme if H0 is true 8 Which distribution feature is described by skewness? a Symmetry only b Tail direction (left or right) c Peak height 9 What is the definition of the standard error in sampling distributions? a SD of the sampling distribution of the mean b Variance of sample means c SD of the population 10 Which test assesses whether two categorical variables are related? a ANOVA b Chi-Square Test of Independence c T-test for means 11 Which measure is best for skewed distributions? a Median b Mode c Mean 12 What does standard deviation measure? a Central tendency b Data range c Spread of data around the mean 13 Which visualization best shows distribution shape and density? a Violin plot b Pie chart c Bar chart 14 What is the formula for z-score? a (score – mean) / SD b (score + mean) / SD c score / mean 15 What distribution is symmetrical and bell-shaped? a Uniform distribution b Skewed distribution c Normal distribution 16 What does the Central Limit Theorem describe? a Population variance decreases with n b Sampling distribution is always normal regardless of n c Means of samples become approx. normal as n grows 17 In NHST, what is the common alpha level? a 0.5 b 0.05 c 0.01 18 Which is a measure of variability? a IQR b Mean c Mode 19 What is p-value best described as? a Probability of observing data as extreme if H0 is true b Probability H0 is true c Probability the alternative is true 20 Which chart type is used for categorical data? a Histogram b Boxplot c Bar chart

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Statistics Final

Froggy Jumps

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Froggy Jumps

Statistics FinalVersión en línea

por Jett Eckel

What is the formula for Pearson's r used to measure linear relationships?

Which unit defines the proportion of variance explained in regression?

In a normal distribution, what are the mean and standard deviation of the standard normal curve?

What does the central limit theorem say about sampling distributions as n grows?

Which visualization best shows the distribution of a quantitative variable?

Which measure is most appropriate for central tendency with skewed data?

What does the p-value represent in NHST?

Which distribution feature is described by skewness?

What is the definition of the standard error in sampling distributions?

Which test assesses whether two categorical variables are related?

Which measure is best for skewed distributions?

What does standard deviation measure?

Which visualization best shows distribution shape and density?

What is the formula for z-score?

What distribution is symmetrical and bell-shaped?

What does the Central Limit Theorem describe?

In NHST, what is the common alpha level?

Which is a measure of variability?

What is p-value best described as?

Which chart type is used for categorical data?