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To prepare a report on the economy, analysts need to estimate the percentage of businesses that plan to hire additional employees in next 60 days.
1. How many randomly selected employees must you contact in order to guarantee with a 92% confidence interval within no more than ± 5%?
2. If analysts believe that at most 20% of the firms are likely to be hiring, how many do they survey in order to guarantee with a 92% confidence interval with a margin of error of 0.05?
a coin is biased so that when flipped it lands heads 75 of the time and lands tails 25 of the time. flip this coin 8
Construct confidence intervals for the unknown population mean from a random sample drawn from a population using the normal distribution?
a five number summary for hours studied in a week were 5 12 14 18 and 20. what was the shortest number of hours studied
Suppose that the coin ?ipped on Monday comes up heads. What is the probability that the coin ?ipped on Friday of the same week also comes up heads?
Find or create a data set that would allow you to explain what is meant by mean, median and mode. Make sure to also show any calculations or formula necessary. Describe or provide as much information on the data set as possible.
Fix-It Copiers advertises mean time of 100 minutes for office calls with standard deviation of 25 minutes. What percentages of calls are completed?
a new operating system is installed at every workstation at a large company. the claim of the operating system
Conduct a 3-period moving average, an exponential smoothing forecasting using an alpha of .25, and a seasonal forecast with 3 seasons.
Leasing agents from the Triangle Mall Management Corporation have suggested that Sunflowers Apparel considered several locations in some of Triangles newly renovated lifestyle malls that cater to shoppers with higher than mean disposable income.
What are the null and alternative hypotheses? In what way do the two estimates of the defect rate in question 3g differ?
Fip it 20 times and if it lands heads 17 times or more then the referee will designate that coin as the weighted one. a) If the coin the referee selects is fair, what is the probability that it gets designated as being weighted?
oh reports that it takes construction workers a mean time of 32 hours and a standard deviation time of 2 hours to
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