Statistics Practice Quiz

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Rio Hondo College *

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130

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Statistics

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Feb 20, 2024

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docx

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Uploaded by JusticePuppyMaster1265

Statistics Practice Quiz What is the measure of central tendency that represents the most frequently occurring value in a dataset? a) Mean b) Median c) Mode d) Standard deviation The range of a dataset is calculated by: a) Subtracting the maximum value from the minimum value. b) Adding the maximum value to the minimum value. c) Dividing the maximum value by the minimum value. d) Multiplying the maximum value by the minimum value. Which of the following is a measure of dispersion? a) Mean b) Median c) Standard deviation d) Mode In a normal distribution, what percentage of data falls within one standard deviation from the mean? a) 25% b) 50% c) 68% d) 95% The correlation coefficient ranges between: a) -1 and 1 b) 0 and 1 c) -∞ and +∞ d) -1 and 0 What does a p-value indicate in hypothesis testing? a) The probability of making a Type I error b) The probability of making a Type II error c) The level of significance of the test d) The probability of observing the data given that the null hypothesis is true Which statistical test is used to compare the means of two independent groups? a) T-test b) Chi-square test c) ANOVA

d) Pearson correlation What is the standard deviation of a sample called? a) Population standard deviation b) Sample standard deviation c) Variance d) Standard error What does the confidence interval represent? a) The range of values within which the population parameter is estimated to lie. b) The probability of rejecting the null hypothesis when it is true. c) The level of significance of the test. d) The proportion of variance explained by the independent variable. What is the purpose of regression analysis? a) To predict the value of a dependent variable based on one or more independent variables. b) To compare means of multiple groups. c) To test for the association between categorical variables. d) To determine the correlation between two continuous variables. Answers: c) Mode a) Subtracting the maximum value from the minimum value. c) Standard deviation c) 68% a) -1 and 1 d) The probability of observing the data given that the null hypothesis is true a) T-test b) Sample standard deviation a) The range of values within which the population parameter is estimated to lie. a) To predict the value of a dependent variable based on one or more independent variables.

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