A pollster believes that 20% of the voters in a certain area favor a bond issue. If 36 voters are randomly sampled from the large number of voters in this area, approximate the probability that the sampled fraction of voters favoring the bond issue will not differ from the true fraction by more than 0.04. (Round your answer to four decimal places.)
You may need to use the appropriate appendix table or technology to answer this question.
Submit Answer
10. [-/3 Points]
DETAILS
MY NOTES
WACKERLYSTAT7 7.3.042.
ASK YOUR TEACHER
The fracture strength of tempered glass averages 13.5 (measured in thousands of pounds per square inch) and has standard deviation 2.
(a) What is the probability that the average fracture strength of 100 randomly selected pieces of this glass exceeds 13.6? (Round your answer to four decimal places.)
(b) Find an interval centered around 13.5, that includes, with probability 0.95, the average fracture strength of 100 randomly selected pieces of this glass. (Round your answers to two decimal places.)
You may need to use the appropriate appendix table or technology to answer this question.