Type of Test
The type of test used to determine if the average number of hours studied by high school seniors in a week is 5 hours.
What is the one sample t - test?
The null hypothesis in a paired t - test.
What is "the average difference in population = 0"?
(There is no difference between before & after)
The meaning of k and N in the ANOVA process.
What is k represents the number of groups and N represents the overall sample size?
A table that displays the proportion of individual frequency to the total frequency of the data (percentages).
What is a relative frequency table?
Type AND number of variables that are displayed in a contingency table.
What are 2 categorical variables?
The statistic that summarizes the direction and strength of the linear relationship in a single numeric value.
What is the Pearson correlation coefficient, r?
The type of test used to determine if there is a difference between the GPAs of freshmen, sophomores, juniors, and seniors.
What is an ANOVA?
The the meaning of the letter "d-bar" in the Paired t-Test t-statistic formula.
What is "mean difference" or the average of the differences between the pairs.
The correct conclusion when conducting an independent t - test with p > 0.05
What is "no difference in population means"?
The type of chart that shows categorical data frequencies where normality and skewedness are not descriptors we can use.
What is a bar chart?
The type of distribution that looks at the overall distribution of one variable, ignoring the other.
What is a marginal distribution?
The amount of change predicted to occur in y for every 1 unit change in x.
What is slope?
The type of test that determines if there is a difference between the average number of hours studied by males in high school versus females in high school.
What is the independent t - test?
A range of possible values of the population mean.
What is a confidence interval?
The significance level you use to look up t-critical values.
What is 0.05
The hypothesis that states the observed distribution of the variable differs from the expected distribution in a Chi-Squared Goodness of Fit test.
What is the alternative hypothesis?
The value that each bar in a stacked bar chart should total up to.
What is 1 or 100%?
Hidden variables that cause strong correlations that are the result of spurious correlations (when 2 variables are correlated by chance, not due to an actual relationship).
What are lurking or confounding variables?
The type of test used to determine if there is a difference in the mean value of blood pressure before taking a prescribed medication and the mean value of blood pressure after taking a prescribed medication.
What is the paired (or dependent) t - test?
The degrees of freedom for a One-Sample t-Test.
What is n - 1?
The p-value when it is determined there is a significant difference between at least 2 group means in an ANOVA.
What is p < 0.05?
This number represents the minimum value all expected counts must have for an accurate Chi-Squared Test.
What is the number 5?
The hypothesis that states two variables are independent in a Chi-Square Test of Independence.
What is the null hypothesis?
A residual value.
What is the observed point - predicted point?
When an ANOVA produces a significant F - statistic, we use this test to investigate which pairs of groups have significantly different means.
What is post - hoc testing?
The test statistic for a one sample t - test.
What is:
(sample mean - claimed mean from H0) / (SE)
Type of error when H0 is true but we rejected H0.
What is a Type I error?
The type of data used in a Chi-Squared Goodness of Fit or Independence test.
What is the categorical data?
The expected counts formula for each cell in a table when performing a chi-square test of independence.
What is:
(row total x column total) / grand total?
The type AND number of variables needed to create a linear regression.
What are 2 numerical (quantitative) variables?