Distributions & Hypothesis Quiz

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Stats basics quiz

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Reem Shawkat

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Distributions & Hypothesis Quiz


Froggy Jumps Distributions & Hypothesis QuizVersión en línea Stats basics quiz por Reem Shawkat 1 What does a negatively skewed distribution look like? a Tail pulled to the right b Tail pulled to the left c Bell-shaped with equal tails 2 In a normal distribution, the mean, median, and mode are: a All different b The same c Only the mean matters 3 Which of the following indicates potential non-normality? a Skewness = 0.1 b Kurtosis = 0.2 c Skewness = 2.5 4 What does the Shapiro–Wilk test assess? a Whether two groups differ b Whether the sample is large enough c Whether the data are normally distributed 5 Which plot is best for visually assessing normality? a Line graph b Histogram with normal curve c Pie chart 6 If your Q–Q plot shows data points deviating from the line, this means: a Your data are perfectly normal b There are no outliers c Your data may not be normally distributed 7 A Type I error occurs when you: a Reject a true null b Fail to reject a false null c Have a large sample 8 A two-tailed hypothesis test is used when: a You are predicting a specific direction b You expect any difference, but not sure of direction c You only care about one outcome 9 The purpose of setting a significance level (α) is to: a Eliminate skewness b Determine sample size c Control the likelihood of a Type I error 10 What does “effect size” tell you? a The practical importance or strength of the result b If the sample is large enough c Whether the p-value is significant 11 What increases statistical power? a Smaller sample size b Higher variability c Larger effect size 12 Power is defined as the probability of: a Controlling for Type I error b Detecting a real effect when one exists c Finding a significant result even if there’s no effect 13 When should you use a nonparametric test? a Your sample is small and assumptions are violated b Data are normally distributed c You have interval-level variables 14 Which of the following is a nonparametric test? a Independent samples t-test b Pearson correlation c Mann–Whitney U 15 What is one key assumption of a parametric test? a Ordinal variables b Normal distribution c Skewed data

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Distributions & Hypothesis Quiz

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Distributions & Hypothesis QuizVersión en línea

por Reem Shawkat

What does a negatively skewed distribution look like?

In a normal distribution, the mean, median, and mode are:

Which of the following indicates potential non-normality?

What does the Shapiro–Wilk test assess?

Which plot is best for visually assessing normality?

If your Q–Q plot shows data points deviating from the line, this means:

A Type I error occurs when you:

A two-tailed hypothesis test is used when:

The purpose of setting a significance level (α) is to:

What does “effect size” tell you?

What increases statistical power?

Power is defined as the probability of:

When should you use a nonparametric test?

Which of the following is a nonparametric test?

What is one key assumption of a parametric test?