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.
D-10 I think or it could be b
Answer:
Next is 76, 82, 86, and 92
Step-by-step explanation:
well your doing slope so...
the formula is "y=mx+b"
(i dont rlly know what your asking but...)
y = x + 5
5 is your y-intercept
y = -3x - 7
-3x is your slope and -7 is your y-intercept