Which of the following functions best describes this graph ?
1 answer:
Answer:
<h2> y = xStep-by-step explanation:
As seen from the graph , the function cuts the x-axis at 4 and 5. So, the roots of function are 4 and 5.
The function becomes :
( x - 4 ) ( x - 5 )
Expanding:
So, after expansion , it becomes :
So, Option D is the correct option.
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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
