I’m pretty sure that the one you marked is correct
The standard deviation of the sample mean differences is 4.854
<h3>How to determine the standard deviation of the sample mean differences?</h3>
The table of values is given as:
<u>Sample Standard deviation</u>
Red box 3.868
Blue box 2.933
The standard deviation of the sample mean differences is calculated using:

This gives

Evaluate the expression

Also, the table of value do not give any information regarding the sample size.
This means that the sample size of the session regarding the number of people would purchase the red box and the blue box are unknown
Hence, the standard deviation of the sample mean differences is 4.854
Read more about standard deviation at:
brainly.com/question/15858152
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Answer:
180 degrees
Step-by-step explanation:
did it on khan
Answer
4+(-x),-x+4
Step-by-step explanation:
Answer: your answer would be B
- 5 over 9
Step-by-step explanation: