Automatic teller machines (ATMs) are stocked with cash to meet the cash needs of

Question

Automatic teller machines (ATMs) are stocked with cash to meet the cash needs of customers. Assume that an average withdrawal amount is $100. Suppose you took a sample of 81 withdrawals and found that the average is $105.2753 and a standard deviation is $20.
If you were to conduct a statistical significance test of the above hypothesis at a 5% significance level,you would use the critical ____ value of ____.
A. T;2.3739 B. T;1.9867 C. T;1.9901 D. T;1.6641 E. Z;1.96 Automatic teller machines (ATMs) are stocked with cash to meet the cash needs of customers. Assume that an average withdrawal amount is $100. Suppose you took a sample of 81 withdrawals and found that the average is $105.2753 and a standard deviation is $20.
If you were to conduct a statistical significance test of the above hypothesis at a 5% significance level,you would use the critical ____ value of ____.
A. T;2.3739 B. T;1.9867 C. T;1.9901 D. T;1.6641 E. Z;1.96
If you were to conduct a statistical significance test of the above hypothesis at a 5% significance level,you would use the critical ____ value of ____.
A. T;2.3739 B. T;1.9867 C. T;1.9901 D. T;1.6641 E. Z;1.96

Explanation / Answer

Here, we have a sample of 81 withdrawals. Hence, degrees of freedom would be 80. With a=0.05 (i.e. 5% significance level), we get the two tailed critical value to be 1.99. Hence, the correct answer is C.T;1.9901.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.