X equal?? helppp plssss
2 answers:
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Answer:
65
Step-by-step explanation:
So we have the expression:
And we want to evaluate it for m=25.
So, substitute 25 for m:
Subtract:
Multiply:
Add:
So, our answer is 65.
And we're done!
Answer:
2.88
Step-by-step explanation:
Data provided in the question
= Population standard deviation = 7 miles per hour
Random sample = n = 32 vehicles
Sample mean = = 64 miles per hour
98% confidence level
Now based on the above information, the alpha is
= 1 - confidence level
= 1 - 0.98
= 0.02
For = 0.01
= 2.326
Now the margin of error is
= 2.88
hence, the margin of error is 2.88