Mathematics, 21.08.2020 22:01 bckyanne3
In last year's survey of travel management professionals, it was found that the lowest salary was $30,000 and the highest salary was $90,000.
a) A new survey is being planned this year. Use the above information to determine how large a sample would need to be to estimate the mean salary of travel management professionals to within $5,000 with 90% confidence.
b) Suppose the standard deviation of the travel management professionals' salaries in the old survey was $20,000. Use this new information and recalculate the sample size asked for in art (a).
c) Which of the above two sample sizes would you use for the new survey this year and why?
Answers: 1
Mathematics, 21.06.2019 19:00
Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2
Answers: 1
Mathematics, 21.06.2019 20:30
Peter applied to an accounting firm and a consulting firm. he knows that 30% of similarly qualified applicants receive job offers from the accounting firm, while only 20% of similarly qualified applicants receive job offers from the consulting firm. assume that receiving an offer from one firm is independent of receiving an offer from the other. what is the probability that both firms offer peter a job?
Answers: 1
Mathematics, 22.06.2019 00:30
20 points + brainliest answer + my mom’s chocolate chip cookie ! subtract.
Answers: 1
In last year's survey of travel management professionals, it was found that the lowest salary was $3...
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