Q: An unbiased coin is thrown n times. It is desired that the relative frequency of the appearance of heads should lie between 0.49 and 0.51. What is the smallest approximate value of n that will ensure this result with 90% confidence (z = 1.645)?
(a)5648
(b)6765
(c)4989
(d)8785
Correct Answer: (b)
The correct answer is (c): 4989. Subject: Science & Technology | Sub-topic: Computer & Information Technology Note: This answer was determined through AI-based research. Verify against the official answer key when available.