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Hypothesis Testing Steps

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Questions and Answers

What is the term used to describe the quantity n – 1 in statistical analysis?

Degrees of freedom (correct)
Degrees of error
Degrees of variance
Degrees of accuracy

What is the primary purpose of determining the critical value in a statistical test?

To determine the measurement scale of the data
To select the type of statistical test to use
To compute the calculated value
To define the region of rejection from the region of acceptance of the null hypothesis (correct)

What is the purpose of calculating the standard deviation of a dataset?

To determine the mean of the data
To calculate the median of the data
To understand the variability of the data (correct)
To identify the mode of the data

Which statistical tool is used to analyze the difference between two groups?

t-test for independent samples (C) Signup and view all the answers

Which type of data analysis involves the examination of multiple relations between multiple variables?

Multivariate Analysis (B) Signup and view all the answers

What is the main purpose of inferential statistics?

To make inferences about a population from a sample (A) Signup and view all the answers

What is the decision if the calculated value is greater than the critical value in a statistical test?

Reject the null hypothesis (D) Signup and view all the answers

What is the first step in performing a statistical test?

Choose the statistical test and perform the calculation (A) Signup and view all the answers

Which statistical tool is used to analyze the relationship between two continuous variables?

Pearson's r (C) Signup and view all the answers

What is the term used to describe the analysis of a single variable?

Univariate analysis (D) Signup and view all the answers

What type of analysis involves the examination of a single variable?

Univariate Analysis (C) Signup and view all the answers

What is the purpose of determining the type of variable in a statistical test?

To choose the appropriate statistical test (D) Signup and view all the answers

What is the main goal of inferential statistics?

To make generalizations about a population from samples (A) Signup and view all the answers

Which test is used to compare the means of two independent groups?

t-test for independent samples (B) Signup and view all the answers

What is the minimum sample size required for using the z-test?

30 (D) Signup and view all the answers

When would you use ANOVA?

When comparing the means of two or more groups (B) Signup and view all the answers

What is the purpose of the t-test for dependent samples?

To compare the means before and after treatment (D) Signup and view all the answers

What type of statistical measure is used to test if the difference between two means is significant?

Test of significance of difference (B) Signup and view all the answers