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The manufacturer of the long-life bulbs claims that their bulbs have an average life of 2000 hrs before failure. The mean and standard deviation of 12 light bulbs randomly selected from the production line were calculated to be 1,960 and 142 hrs, respectively. Do the sample data present sufficient evidence to reject the manufacture's claim? Test using a a=0.05. What is the p-value of the test.
In general, determine the standard score a measure of?
Could mud-wrestling be the cause of a rash contracted by University of Washington students in the spring of 1992? Two physicians at the University of Washington health center wondered this when one male and six female students complained of rashes..
Construct a 90% two-sided confidence interval onthe difference between the proportion nonconforming in processes 1 and 2. Based on this confidence interval, can you conclude at a significance level of 10% that the difference is not equal to 10%? W..
Testing for population mean - warp-breaking specification of the manufacturer at the .05 level of significance?
State one referenced hypothesis including the three variables (FA as an IV, age as the covariate and RS as the DV)
Consider a hypothesis test of H0: μ = 0 against H1: μ > 0 where μ is the mean percent change in total body bone mineral content of young women. The population standard deviation is σ = 2. The level of significance for the test is α = 0.05.
Illustrate by computation that, for straight -line regression of Y on x, β1= 0.
It is known that 60 percent of all registered voters in the 42nd congressional District are Republicans. There registered voters are selected at random from the district. Compute the probability that exactly 2 of the 3 selected are Republicans, u..
Can you test the significance of the relationship between physical activity level and systolic blood pressure, adjusting for age, and weight, given the ANOVA table above?
Consumer Review posts reviews and ratings of a variety of products on internet. The following is a sample of 20 speaker systems and their ratings (www.audioreviews.com).
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
A recent study reported that the prevalence of hyperlipidemia (defined as total cholesterol over 200) is 30% in children 2-6 years of age. If 12 children are analyzed,
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