Answer to Question #16025 in Statistics and Probability for christina garcia

Question

Assuming the population variances are known, the population variance of the difference between two sample means is
A) the sum of the two means.
B) the sum of the variances for each population.
C) the sum of the standard deviations for each population.
D) the sum of the sample sizes for each population.

Answer 1

Answer:
C) the sum of the standard deviations for each population
Because
standard deviation is numerical value of variances and this index reveal
differences between each sample.