T-Test (Hypothesis Testing)

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    RAFAEL

    Cards (35)

    • What is the purpose of t-test?
      To compare the means of two groups
    • Which type of t-test is used for comparing the means of two independent groups?
      Independent samples t-test
    • Which assumption is required for a t-test?
      Homogeneity of variances
    • What is the null hypothesis in an independent samples t-test?
      The means of the two groups are equal
    • What does a significant p-value in a t-test indicate?
      The null hypothesis is rejected
    • What does Cohen's d measure in the context of a t-test?
      The magnitude of the difference between group means
    • Which t-test is used when comparing the same group of individuals at two time points?
      Paired t-test
    • If the Levene's test in an independent samples t-test is significant, what should you do?
      Use the equal variances not assumed results
    • What is the critical value in a t-test?
      The threshold of rejecting the null hypothesis
    • When is a one-sample t-test used?
      To compare the mean of a single sample to a known value
    • Purpose of a t-test
      To compare the means of two groups
    • Which t-test is used to compare two independent samples?
      Independent samples t-test
    • What is the null hypothesis in a two-tailed t-test?
      The means of two groups are equal
    • What assumption does the independent t-test require?
      The variances of the two groups are equal
    • What does a p-value of 0.02 in a t-test suggest?
      The null hypothesis is rejected at the 0.05 level
    • Which of the following measures the effect size in a t-test?
      Tukey's HSD
    • When is the paired t-test used?
      To compare means of a single group at two time points
    • Critical value in a t-test
      The threshold for rejecting the null hypothesis
    • Test statistic in a t-test
      The computed t-value used to assess significance
    • What does it mean if Levene's test is significant in an independent samples t-test?
      The assumptions of the t-test are violated
    • Primary purpose of t-test
      To compare the means of two groups
    • Which t-test is used to compare the means of a single group to a known value?
      One-sample t-test
    • What is the null hypothesis in a one-sample t-test?
      The sample mean equals the population mean
    • What is the main assumption of the independent samples t-test?
      The variances between groups are equal
    • When is the paired samples t-test used?
      To compare the same group at two times point
    • What does a two-tailed t-test assess?
      Whether the means of two groups are significantly different in either direction
    • What does a significant p-value in a t-test indicate?
      The null hypothesis is rejected
    • What is the formula of for degrees of freedom in an independent samples t-test?
      n1+n1+n2−2n2-2
    • Which assumption is tested by Levene's test in a t-test?
      Homogeneity of variances across groups
    • If Levene's test is significant, what should be done in an independent samples t-test
      Use the "equal variances not assumed" results
    • What does Cohen's d measure in the context of a t-test?
      The effect size or magnitude of the mean difference
    • Critical value in t-test
      Threshold for rejecting the null hypothesis
    • Type I error in the context of t-test
      Rejecting the true null hypothesis
    • It increases the power of a t-test
      Increasing the sample size
    • Purpose of a one-sample t-test
      To test whether the mean of a single group differs from a specified value.
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