The most dangerous nuclear confrontation of the Cold War occurred in 1962

A Type II error occurs when a researcher

A) Devises an incorrect null hypothesis. B) Rejects the null hypothesis when it should be retained. C) Does not reject the null hypothesis when it should be rejected. D) Makes a large mistake in data collection.

In Dred Scott v. Sandford, the Supreme Court declared that

A) blacks could not be citizens and Congress could not ban slavery in the territories. B) blacks could be citizens and Congress could ban slavery in the territories. C) ?blacks were free in the territories, but slaves in the South. D) ?slavery was unconstitutional in both the states and territories. E) slavery was abolished in the territories, but allowed in the states.