Question 5 • Advanced Algebra: Concepts and Connections
A simple random sample of 85 is drawn from a normally distributed population, and the mean is found to be 146, with a standard deviation of 34. Which of the following values is outside the 99% confidence interval for the population mean? Use the table to help you answer the question. Confidence Level 90 percent 95 percent 99 percent z to the ast th power -score 1 point 6 4 5 1 point 9 6 2 point 5 8 Remember, the margin of error, ME , can be determined using the formula ME is equal to the fraction with numerator z times s and denominator square root of n
Answer
A
the value of 138 because it is less than 153 point 2
B
the value of 137 because it is greater than 136 point 5
C
the value of 135 because it is not greater than 136 point 5
D
the value of 154 because it is greater than 153 point 2