Find and interpret a 95% confidence interval to estimate the average number of bolts per box for all boxes in the population. Round to 3 decimal places.

Complete Question

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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

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

step-by-step explanation: