Multiple Choice
Suppose that,on average,electricians earn approximately µ = $54,000 per year in the United States.Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is σ = $12,000 dollars.What is the probability that the average salary of four randomly selected electricians is more than $50,000 but less than $60,000?
A) 0.5899
B) 0.7486
C) 0.8413
D) 0.9048
Correct Answer:
Verified
Correct Answer:
Verified
Q17: If <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB4266/.jpg" alt="If is
Q18: Over the entire six years that students
Q24: The standard deviation of <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB4266/.jpg" alt="The
Q26: Under what condition is the finite population
Q41: Nonresponse bias occurs when those responding to
Q48: In a small town, there are 3,000
Q85: Selection bias occurs when _.<br>A) the population
Q100: A fast-food restaurant uses an average of
Q108: Successful firms must focus on the quality
Q134: Suppose the average math SAT score for