单选题
编号：2690461
1. A study was conducted to determine whether the standard deviation of monthly maintenance costs of a Pepper III aircraft is $300. A sample of 3 Pepper IIIs had a mean monthly maintenance cost of $3,025 and a standard deviation of $325. Using a 5% level of significance, which of the following is the most appropriate conclusion regarding the difference between the hypothesized value of the population variance and the sample variance?
- A.The population and sample variances are significantly different.
- B.The population and sample variances are not significantly different.
- C.There are no tests that may be used to test variance differences in small samples.