Mrs. Wood is a librarian at Westside Library. In examining a random sample of the library's book collection, she found the follo
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Complete Question
The complete question is shown on the first uploaded image
Answer:
The 95% confidence interval is
This means that there is 95% chance that the true population mean is within this interval
Step-by-step explanation:
From the question we are told that
The sample size is n = 30
The sample mean is
The population standard deviation is
Given that the confidence level is 95% then the level of confidence is evaluate as
Next we obtain the critical value of from the normal distribution table , the values is
Generally the margin of error is mathematically represented as
substituting values
The 95% confidence interval is mathematically represented as
substituting values
Assuming your system of equations is
The answer is C. Infinitely many solutions. If my assumption is incorrect, then the answer will be likely different.
The reason why it's "infinitely many solutions" is because the first equation is the same as the second equation. The only difference is that everything was multiplied by -1. You could say that both sides were multiplied by -1.
Both equations given graph out the same line. They overlap perfectly yielding infinitely many solution points on the line.