Module 6 Quiz Flashcards
To increase statistical power, you can:
Increase sample size
The null hypothesis will be rejected when:
The test statistic exceeds the critical value
When calculating a z-test, the standard error is:
σ/√n
A one-tailed test at α = .01 has a critical value of:
2.33
When would you use a two-tailed test?
When you don’t predict the direction of the effect
The margin of error in a confidence interval is:
The critical value times the standard error
The level of confidence for an interval is:
Equal to 1 - α
To test a hypothesis using a confidence interval, you reject the null hypothesis when:
The null value falls outside the interval
As sample size increases, the t-distribution:
Becomes more like the normal distribution
Degrees of freedom for a one-sample t-test is calculated as:
n - 1
