Answer:
A. Use the two-sample t-methods when a sample was taken from each of two populations (i.e. two groups being compared) and the population standard deviations are not known.
Step-by-step explanation:
T-distribution:
When the population standard deviation is not known, the t-distribution is used.
If a sample was taken from one population, we use the one-sample method, while if there is a comparison of two populations, the two-sample method is used, and thus, the correct answer is given by option A.
Answer:
Step-by-step explanation:
Answer:
three places to the right!
Step-by-step explanation:
Move the decimal point to the right as many places as there are zeros in the factor. Move the decimal point one step to the right (10 has one zero). Move the decimal point two steps to the right (100 has two zeros).
Hope this helps!
Answer:
line DC
Step-by-step explanation:
Hello,
2 different points define a line, right?
so you can exclude the two first answers as they involve 1 and 3 points.
There is no point M, right? you can get rid of the third answer.
There are the two points D and C which defines the line DC which is m
thanks