assuming above tabe inclues all samples??

No.PZ2015120604000052 (选择题)

来源: 品职出题

The table below shows part of the monthly stock returns of Ivy Corp.

Calculate the sample standard deviation for Ivy Corp. returns, assuming above tabe inclues all samples??

您的回答, 正确答案是: A

A

8.78%.

B

不正确

8.01%.

C

77.1%2.

数据统计(全部)

做对次数: 2290

做错次数: 860

正确率: 72.70%

数据统计(个人)

做对次数: 0

做错次数: 1

正确率: 0.00%

解析

A is correct

Sample standard devation is 8.78%, the square root of sample variance 77.1%2

这里我选了B，assuming above tabe inclues all samples??是否代表population parameter？这样样本就和总体一样了，需要除以n，即除以6，而不是（6-1=5）？是否我理解错了？