A recent survey indicated that the average amount spent for breakfast by business managers was $\$ 7.58$ with a standard deviation of $\$ 0.42$. It was felt that breakfasts on the West Coast were higher than $\$ 7.58$. A sample of 81 business managers on the West Coast had an average breakfast cost of $\$ 7.65$. At $\alpha = 0.05$, what is the critical value?
A) -1.5
B) 1.65
C) 1.5
D) 1.96

Question

Quizplus · Accepted Answer

The critical value for a one-tailed test at $\alpha = 0.05$ is 1.65 when using the standard normal distribution (Z-distribution).

A Recent Survey Indicated That the Average Amount Spent for Breakfast