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A machine used to regulate the amount of dye dispensed for mixing shades of paint can be set so that it discharges a desired average amount of dye per can of paint. The amount of dye discharged is known to have a normal distribution with a standard deviation equal to 0.5 milliliters (ml). If more than 15 ml of dye are discharged when making a particular shade of blue paint, the shade is unacceptable. Determine the setting for the mean so that no more than 1% of the cans of paint will be unacceptable.
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
What is wrong with this design? What confounds could be leading to the results of improved memory and problem-solving skills?
You are a realtor with a small business. You use a simple 2 variable linear regression analysis for quick first glance house price estimates using square footage of the house.
Construct a decision table for this problem. Include all conditional values and probabilities in the table.
Find a 95% confidence interval for the population mean selling price of all homes in this neighborhood.
Compute the z-score for M = 89 for a sample of n = 25 scores. Is this sample mean in the middle 95% of the distribution?
The p-value of the test is closest to:
Identify the scale of measurement in each of the following:
Normal distribution has mean of 80 and standard deviation of 14. Find out the value above which 80 percent of values will occur.
A health care analyst would like to know that if the duration of a given eye surgical procedure has a normal distribution with a mean of 240 minutes and a standard deviation of 40 minutes
Find out which (t-, z- or neither) distribution is suitable Then if you can utilize either a t- or z- distribution, provide associated critical value (critical t- or z- score) from that distribution to reach given confidence level.
Walleye is a common game fish. Adult walleye have a length with a mean of 44 cm and a standard deviation of 4 cm and the distribution of lengths is approximately Normal. What fraction of walleye are between 40 and 48 cm in length?
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