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The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 30 state employees who do similar work is $58,800 with population standard deviation = $1500. At the 0.01 level of significance, can it be concluded that state employees earn on average less than federal employees?
1) Western Clothing Company produces denim jeans. Each month the company incurs a fixed cost of $10,000 and variable cost of $8 per pair of jeans. Demand for the jeans depends on the price (P) according to the following relationship: Demand = 1,500 -..
The ratio of the two population variances.
A friend has offered to play a gambling game with you that involves flipping a coin that he has provided. Since a flip of heads will be to his advantage, you want to test the coin for fairness before you begin to play. Your friend is willing to..
Estimate Carl's performance on the new machine.
According to a survey by Accountemps, 48% of Canadian executives within medium sized companies believe that employees are most productive on Tuesdays. Suppose 200 executives are randomly surveyed.
A medical researcher wishes to estimate what proportion of babies born at a particular hospital are born by Caesarean section. In a random sample of 100 births at the hospital, 34% were Caesarean sections. Find the 95% confidence interval for ..
A cell phone company offers two plans to its subscribers. At the time new subscribers sign up, they are asked to provide some demographic information. The mean yearly income for a sample of 40 subscribers to Plan A is $59,100 with a standard d..
Given a standard normal distribution
The control chart is a graph used to track and monitor how a process develops or changes over time. A control chart always has a central line for the average, an upper line for the upper control limit and a lower line for the lower control limit. The..
Which of the following may be considered a variable
1)Customers enter a store according to a Poisson process of rate A = 6 per hour. Suppose it is known that but a single customer entered during the first hour. What is the conditional probability that this person entered during the first fifteen minut..
The expected value is within one standard deviation of themean(so you must calculate both the standard deviation and expected value for your game).
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