Can you see it ?
I hope the picture help !
Answer:
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Step-by-step explanation:
The answer is 9/5 as 3×3 is 9 and you are dividing it by 5.
Answer:
The correct option is (C) (2.769, 3.231).
Step-by-step explanation:
The confidence interval for mean when the standard deviation is not known is:

Given:

Compute the critical value as follows:

**Use a <em>t</em>-table.
The 95% confidence interval for true mean length of the bolt is:

Thus, the 95% confidence interval for true mean length of the bolt is (2.769, 3.231).
The correct option is (C).
Answer:
45
Step-by-step explanation:
i hope this helps you :) i would do the middle one but you dont need that one