Answer: (-2,1)
Step-by-step explanation:
Read it lije (x,y)
Answer: The margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.
Step-by-step explanation:
Since we have given that
Sample size = 400
Mean = $357.75
Standard deviation = $37.89
At 95% confidence level, z = 1.96
We first find the margin of error.
Margin of error is given by

95% confidence interval would be

Hence, the margin of error = 3.71, confidence interval = (354.04, 361.46) and it means that mean cost is lies within the confidence interval.
The number X is placed somewhere between 9 and 10. That's because 9 squared is 81 and 10 squared is 100.
Answer:
98
Step-by-step explanation:
Add them all up. 60+20= 80+18 = 98.
Answer:
30:9
Step-by-step explanation: