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The mean sales per customer µ for all of the sales for your company last month is not known. Based on your past experience, you are willing to assume that the population standard deviation of sales, σ, is about $220. If you take a random sample of 100 sales, what is the value of the standard error of x¯¯? If you take a random sample of 25 sales, what is the value of the standard error for x¯¯? Remember that the sampling distribution of x¯¯ is normal with a mean of µ and a standard deviation of σx¯.
Create the indicator variables, the raw data does not include these - calculate a difference in the gscores between the consecutive rows; this is how we know if the Gleason score has increased since the last biopsy, which is one of the indicators f..
Calculate the regression equation for this data
12) The time it takes to process phone orders in a small florist/gift shop is normallydistributed with a mean of 6 minutes and a standard deviation of 1.24 minutes.a. What cutoff value would separate the 2.5% of orders that take the most time ..
The average Monthly rent for one bedroom apartments in Chattanooga has been $700. Because of the downturn in the real estate market, it is believed that there has been a decrease in the average rental. State the null and alternative hypothesis
On any given flight, an airline's goal is to fill the plane as much as possible without overbooking. If, on average, 10% of customers cancel their tickets, all independently of each other, what is the probability that a particular flight will be o..
The Webster National Bank is reviewing its service charges and interest-paying policies on checking accounts. The average daily balance on personal checking accounts is $850, with a standard deviation of $150. In addition, the average daily ba..
What was the total number of participants surveyed for the study and what was the total number of participants who completed the entire survey?
A typical incoming telephone call to your catalog sales force results in a mean order of $ 28.63 with a standard deviation of $ 13.91. You may assume that orders are received independently of one another.
1. for commercial flights in 2009 approximately 90 arrived on time within 15 minutes of scheduled arrival time.
You need to do interpretation these three tables in single page
Injector pump and injectors tested and found OK
Identify sample, population, sampling frame (if applicable), and response rate (if applicable). Describe sampling technique (if applicable) or experimental design
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