Wages in Construction Industry
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Wages in the construction industry average $11.90 per hour with a standard deviation of $1.40.
What percent of workers make less than $10.50 per hour (z = -1.00)?
2. The probability of employees taking the time to fill out a survey at Comptex is 17%. There are 5 people in the department managed by Alice. What is the probability that at least one of Alice's employees has taken the survey? Use the binomial table below to provide an answer to Alice's question.
Probability = .17
0 0.393904
1 0.403396
2 0.165246
3 0.033846
4 0.003466
5 0.000142
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Solution Summary
139 words explain calculations to find what percentage of workers make less than $10.50 an hour.
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Wages in the construction industry average $11.90 per hour with a standard deviation of $1.40.
1. What percent of workers make less than $10.50 per hour (z = -1.00)?
By looking up the z-table, we know that
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- BSc , Wuhan Univ. China
- MA, Shandong Univ.
Recent Feedback
- "Your solution, looks excellent. I recognize things from previous chapters. I have seen the standard deviation formula you used to get 5.154. I do understand the Central Limit Theorem needs the sample size (n) to be greater than 30, we have 100. I do understand the sample mean(s) of the population will follow a normal distribution, and that CLT states the sample mean of population is the population (mean), we have 143.74. But when and WHY do we use the standard deviation formula where you got 5.154. WHEN & Why use standard deviation of the sample mean. I don't understand, why don't we simply use the "100" I understand that standard deviation is the square root of variance. I do understand that the variance is the square of the differences of each sample data value minus the mean. But somehow, why not use 100, why use standard deviation of sample mean? Please help explain."
- "excellent work"
- "Thank you so much for all of your help!!! I will be posting another assignment. Please let me know (once posted), if the credits I'm offering is enough or you ! Thanks again!"
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