Statistics and Probability Final Exam

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40 questions

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- Q1What is the purpose of hypothesis testing?To determine if there is enough evidence to reject the null hypothesis.To prove the null hypothesis is true.To accept the alternative hypothesis.To make assumptions about the population parameter.30s
- Q2What is a Type I error in hypothesis testing?Accepting the null hypothesis when it is actually false.Rejecting the null hypothesis when it is actually true.Accepting the alternative hypothesis when it is actually false.Not being able to reject either the null or alternative hypothesis.30s
- Q3What is a p-value in hypothesis testing?The probability of obtaining a more extreme than the observed sample statistic, assuming the alternative hypothesis is true.The difference between the sample mean and population mean.The sample size for the hypothesis test.The probability of obtaining a test statistic as extreme as or more extreme than the observed sample statistic, assuming the null hypothesis is true.30s
- Q4What is a Type II error in hypothesis testing?Failing to reject the null hypothesis when it is actually false.Rejecting the null hypothesis when it is actually true.Accepting the null hypothesis when it is actually false.Accepting the alternative hypothesis when it is actually false.30s
- Q5What is the significance level in hypothesis testing?The probability of obtaining a Type I error.The predetermined threshold for deciding whether to reject or fail to reject the null hypothesis.The sample size for the hypothesis test.The difference between the sample mean and population mean.30s
- Q6What is univariate data?Data with only one variable.Data with multiple variables.Data with no variables.Data with both numeric and categorical variables.30s
- Q7What does bivariate data refer to?Data with three variablesData that cannot be graphedData with two variables that can be plotted on a scatterplotData with only one variable30s
- Q8What is an example of bivariate data?Favorite foodEye colorBlood typeHeight and weight30s
- Q9Which of the following is an example of multivariate data?A dataset containing information on the number of hours worked per week.A dataset containing information on a person's age, income, and education level.A dataset containing only a person's age.A dataset containing a person's height and weight.30s
- Q10What is multivariate data?Data with discrete variablesData with no variablesData with only one variableData with multiple variables30s
- Q11What type of plot is used to visualize the relationship between two continuous variables?Bar plotLine graphScatter plotPie chart30s
- Q12What type of data is typically plotted on the y-axis in a scatter plot?CategoricalOrdinalNumericalBinary30s
- Q13What is the main purpose of using a scatter plot?To display categorical dataTo compare means of two samplesTo show the relationship between two numerical variablesTo show the distribution of a single numerical variable30s
- Q14What is the purpose of adding a trend line to a scatter plot?To connect the points on the scatter plotTo show the distribution of the dataTo add color and visual interestTo show a correlation or trend in the data30s
- Q15In a scatter plot, how can you determine if there is a positive correlation between two variables?The points on the plot tend to form a pattern that slopes upwards from left to rightThe points on the plot tend to form a horizontal lineThe points on the plot tend to form a diagonal line from the bottom left to the top rightThe points on the plot tend to form a random or scattered pattern30s