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We would like to estimate the mean teacher's salary in the Chapel Hill school district, with 99% confidence, to an accuracy within $2,000. Past studies show that the most likest value of the variance would be $6,000. Calculate an approximate sample size that we may use in this situation.please can you solve it in details with the steps
q1. records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a
A book publisher wants to know if there is a relationship between gender and book-type preferences in recreational readers. Recreational readers in a simple random sample were asked if they prefer reading mysteries, romance novels, or self-help bo..
Two servers with lambda 1 & lambda 2 service times exponentially distributed. Pat waits in a line to get served by any of the two servers. What is the waiting time of pat if no one is on the line?
one concern in the evaluation of research results is that the subjects in one treatment condition may be substantially
Airline company officials find that 86% of all people who make reservations show up for their flights. If an airline has accepted 240 reservations and if there are 213 available seats
The average height of male physicians employed by a Veterans Affairs med- ical center is 180.18 cm with a standard deviation of 4.75 cm. Find the probability of obtaining a mean height of 184.93 cm or greater for a sample size of 5.
You select a random sample of 16 cities similar to Statesville in demographic and economic characteristics and collect the following data on FOOTAGE (in 10,000 square feet) and RETURN (rate of return as a %). a. Analyze the above output to determi..
If a random sample of 5 observations from one population results in a standard deviation of 12 and the other random sample of 7 observations results in a standard deviation of 7.
Suppose you have the experiment of flipping a coin three times.
Find the mean and median of the transformed heights and convert the mean and median of the transformed data back to the original units.
Calculate the mean, median, mode, and midrange of the data. Show your work. If your data set contains too many data points to show the work explain in detail how you calculated the mean, median, mode and midrange.
assume that google is hiring employees on the different business days of the week monday through friday with equal
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