Week 8

What is the purpose of calculating the t-statistic in hypothesis testing?

• To determine the sample size.

• To compare the group mean with the known value.

• To calculate the probability of observing the null hypothesis.

• To interpret the results.

What is the formula for calculating the t-statistic?

• t = (x̄ - μ) / (s/√n)

• t = (μ - x̄) / (s/√n)

• t = (x̄ - μ) / (n/√s)

• t = (x̄ + μ) / (s/√n)

In the formula for the t-statistic, what does 'x̄' represent?

• Sample mean

• Population mean

• Sample size

• Sample standard deviation

In the formula for the t-statistic, what does 'μ' represent?

• Sample mean

• Population mean

• Sample size

• Sample standard deviation

In the formula for the t-statistic, what does 's' represent?

• Sample mean

• Population mean

• Sample size

• Sample standard deviation

In the formula for the t-statistic, what does 'n' represent?

• Sample mean

• Population mean

• Sample size

• Sample standard deviation

What is the formula for calculating the degrees of freedom (df) in this test?

• n+1

• n-1

• n*2

• n/2

What is the degrees of freedom (df) if the sample size is 40?

• 38

• 39

• 40

• 41

What is another name for a paired t-test?

• Independent sample t-test

• Dependent sample t-test

• Single sample t-test

• Two-way ANOVA

In a paired t-test, how many times is each subject measured?

• Once

• Twice

• Three times

• Four times