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Statistics Exam Quiz Question 1: Descriptive Statistics Given the dataset: 8, 12, 14, 16, 18, 20, 22, what is the mode? a) 14 b) 16 c) 18 d) There is no mode Question 2: Probability If you draw a card from a standard deck of 52 cards, what is the probability of drawing a heart or a spade? a) 1/2 b) 1/4 c) 1/3 d) 1/2 Question 3: Sampling Methods Which sampling method involves selecting individuals who are conveniently available or easy to reach? a) Simple random sampling b) Convenience sampling c) Stratified sampling d) Systematic sampling Question 4: Hypothesis Testing What does the p-value represent in hypothesis testing? a) The probability of observing the given sample data, assuming the null hypothesis is true b) The probability of rejecting the null hypothesis c) The probability of committing a Type I error d) The probability of accepting the null hypothesis Question 5: Correlation If the correlation coefficient between two variables is -0.60, what does this suggest about their relationship? a) There is a moderate positive linear relationship b) There is a moderate negative linear relationship

c) There is no linear relationship between the variables d) The variables are perfectly negatively correlated Question 6: Probability Distribution Which probability distribution is used to model the number of events occurring in a fixed interval of time or space? a) Normal distribution b) Poisson distribution c) Binomial distribution d) Exponential distribution Question 7: Confidence Intervals In a 95% confidence interval for the population mean, what is the z-score if the distribution is standard normal? a) 1.96 b) 2.33 c) 1.645 d) 2.58 Question 8: Regression Analysis In multiple linear regression, what does the coefficient of determination (R-squared) measure? a) The proportion of the total variation in the dependent variable explained by all the independent variables together b) The strength of the relationship between each independent variable and the dependent variable c) The average change in the dependent variable for a one-unit change in each independent variable d) The intercept of the regression line Question 9: Data Visualization Which type of plot is used to display the relationship between two categorical variables? a) Histogram b) Scatter plot c) Bar chart d) Line chart Question 10: Measures of Dispersion

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