Exam 9: Hypothesis Testing

When testing a hypothesis about a single mean,if the sample size is 51 and the population standard deviation is known,the correct test statistic to use is ___________.

A Type II error is failing to reject a false null hypothesis.

After testing H₀: p = .33;versus H_A: p < .33;at α = .05,with = .20 and n = 100,we do not reject H₀.

A recent study conducted by the state government attempts to determine whether the voting public supports a further increase in cigarette taxes.The opinion poll recently sampled 1,500 voting age citizens.1,020 of the sampled citizens were in favor of an increase in cigarette taxes.The state government would like to decide if there is enough evidence to establish whether the proportion of citizens supporting an increase in cigarette taxes is significantly greater than .66.Using the critical value rule,at α = .10,we would not reject H₀.