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A quality control experiment is to be done on a machine that fills tubes with toothpaste. It's specifications require that it till tubes with 4.7oz. A random sample of 40 tubes filled by the machine is taken and each tube is weighed. The resulting data are below, with the weight of the tube already having been subtracted from each. Perform a hypothesis test at the 90% confidence level to determine if the machine is performing according to specifications.
4.66 4.61 4.71 4.63 4.70 4.62 4.63 4.61 4.70 4.56
4.60 4.66 4.68 4.57 4.67 4.72 4.67 4.64 4.66 4.75
4.69 4.64 4.67 4.65 4.69 4.65 4.75 4.53 4.57 4.74
4.68 4.67 4.66 4.68 4.64 4.65 4.64 4.80 4.71 4.69
In 2002 the Supreme Court ruled that schools could require random drug tests of students participating in competitive after-school activities such as athletics.
The average cost for service provided per person per day is random variable with normal distribution of N$ 100 and a standard deviation of N$ 22. What is the probability that the cost will be at least N$ 127 per day per person.
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A statistical study reported that the drug was effective with the p-value of .042. Is this true? The effective sample may be found about 42 times in 1000 samples.
question a researcher wishes to try three different techniques to lower blood pressure. subjects are randomly assigned
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suppose a b and c are independent events with probabilities pa pb and pc. what are the probabilities that at least
Use the steps of hypothesis testing. (b) Sketch the distributions involved. (c) Explain your answer to someone who has never taken a course in statistics.
(a) Write the fitted regression equation, (c) What is your conclusion about the slope.
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