Critical values (pt. 2)

Critical values (one group t-test)

Use R to find the following critical values for a one group independent samples t-test:

## alpha = 0.05, n = 40, H_a: x_bar != mu

## alpha = 0.05, n = 13, H_a: x_bar < mu

## alpha = 0.01, n = 8, H_a: x_bar != mu

## alpha = 0.01, n = 32, H_a: x_bar > mu

Use R to find the following critical values:

## alpha = 0.05, n = 40, sigma is known, two-tailed test

## alpha = 0.025, n = 45, sigma is unknown, one-tailed test

## alpha = 0.05, n = 13, sigma is known, one-tailed test

## alpha = 0.01, n = 3, sigma is unknown, two-tailed test

## alpha = 0.10, n = 30, sigma is known, two-tailed test