Statements are all TRUE
sinA = and cosB =
cscA = 1/sinA = 1/(a/c) = and secB = 1/cosB = 1/(a/c) =
tanA = and cotB= 1/tanB = 1/ (b/a) =
What is04.53 divided by0.0003
1 answer:
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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.