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Washing clothes
A consumer group wants to test the effectiveness of a new organic laundry detergent and make recommendations to customers about how to best use the product. They intentionally get grass stains on 30 white T-shirts in order to see how well the detergent will clean them. They want to try the detergent in cold water and in hot water on both the regular and delicates wash cycles.
Design an appropriate experiment, indicating the number of factors, levels, and treatments. Explain the role of randomization in your experiment.
Hint: Given any x ∈ X , let U be a neighborhood of x with compact closure. Show that there is a continuous real function f on X ,0 at x , and 1 on X \U . Use this function to show that x is not in the closure of K \U .
in 1894druggist asa candler began distributing handwritten tickets to his customers for free glasses of coca-cola at
Assuming for a moment that 35% of all Ralph's customers have a discount card, what is the probability of getting a sample proportion at least this big?
general population is skewed to the right the mean degree of affection is 60 standard deviation is 16. sample 100
How to assign participants to conditions, how to eliminate confound variance and minimize error variance, and how to measure job performance.
A hypothetical statistics author is obsessed with making 10-foot putts. Each day that he practices, he putts 60 times and counts the number he makes.
a pressure tranducer outputs 0.28 volts at 2.4 psi and 4.82 volts at 28.67 psi. assuming the pressure transducer is
A psychologist determined that the number of sessions required to obtain the trust of a new patient is 1, 2, and 3. Let x be the random variable indicating the number of sessions required to gain the patient's trust. The following probability fu..
a company has observed that there is a linear relationship between indirect labor expense ile in dollars and direct
Assuming the population variances from both offices are equal, is there evidence of a difference in the mean waiting time between the two offices? Use α = 0.05
What deccision should be made about the null hypothesis, and what decision should be made about the effect of the program.
A small water proof electric motor is being tested. The motor is in a container with some ice and water, which are initially in equilibrium.
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