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A sample of 12 measurements has a mean of 40 and a standard deviation of 3.25. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 40 each. Find the standard deviation of the sample of 14 measurements.
In 2004, Newsmonth reported that 60% of young children have blood lead levels that could impair their neurological development. Assuming that a class in a school is a random sample from the population of all children at risk
Find a point estimate of the population mean. Find the 95% confidence interval of the population mean. Assume the variable is normally distributed.
Use Chebyshev's theorem to find what percent of the values will fall between 201 and 345 for a data set with a mean of 273 and standard deviation of 18.
Delivery time over twenty delivery days was 8.6 hours. At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
What is the probability there will be between 10 and 14 calls inclusive arriving at the company in the next 15 minutes?
Prove that there are no integers x, y, and z such that. Show that square root of 2 cubed is an irrational number.
Due to financial hardship, the Nyke shoe company feels they only need to make one size of shoes, regardless of gender or height. They have collected data on gender, shoe size, and height
Suppose ages for first marriages have normal distribution with standard deviation of four years. Determine the probability that the person getting married for first time is younger than 23 years of age?
Develop a spreadsheet model to determine the optimal number of magazines to order each day. Use 500 replications and round the demand values generated by the normal random number generator (RNG) to the closest integer value.
A manufacturer of automobile transmissions uses three different processes. The management ordered a study of the production costs to see if there is a difference among the three processes. A summary of the findings is shown below.
Evaluate the probability that patient taking drug will experience flu symptoms.
A representative of the environmental protection agency (EPA) wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples.How many different samples are possible?
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