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luda_lava [24]
3 years ago
8

A simple random sample is drawn from a normally distributed population, and when making a statistical inference about the popula

tion mean, the margin of error is found to be 5.9 at a 95% level of confidence. If the mean of the sample is 18.7, what is the 95% confidence interval for the population mean?
Mathematics
2 answers:
DiKsa [7]3 years ago
3 0
<span>To find the confidence interval, add and subtract the margin of error from the mean. With mean 18.7 and margin of error 5.9, you have 95% confidence the answer is between 12.8 and 24.6.</span>
V125BC [204]3 years ago
3 0

Answer:

B. 18.7 ± 9.7

Step-by-step explanation:

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5x+3y=9.. B

2x-4=40...A

Solve A for x.

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y = -101/2

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