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Two companies make instruments for bands. Company A's product has a lifespan of 5 years and a standard deviation of 15 months. Compny B's product has a mean lifespan of 5 years and a standard deviation of 3 months. Which company's instruments has a more predictable lifespan.
when testing for the significance of the slope parameter which of the following are implied by the alternative
in a management trainee program 80 percent of the trainees are female 20 percent male. ninety percent of the females
A company would like to test the claim that more than 2% of parts are defective, 20 randomly selected parts were chosen and 3 were defective
How large a sample size is needed to estimate population mean to within five units with 92% confidence?
What is the difference between the t-test for correlated groups and the t-test for single samples?
Draw a picture of the sampling distribution of H, the highest number each day, and compare it to the equivalent picture for the Cash 5 game, shown in Figure. Do you expect them to be similar? Are they?
A presidential candidate's aide estimates that, among all college students, the proportion p who intend to vote in the upcoming election is at least 60%.
Consider a simple linear regression relating y = exam score (ranging from 0 to 100 points) to x = amount (in dollars) paid for a tutor for a sample
Probability for exactk=3 girls in the sample of 5 students - find X=a for eg top 10% or low 20%.
two parts are assembled. the distributions of x1 and x2 are normal with micro1 20 s1 0.3 and micro2 19.6 s2 0.4.
Conduct an analysis of variance to determine whether the mean dominance ratings differ among the six facial expressions. Use α = .10.
Calculate the test statistic. Use the information given...Suppose you are interested to see if less than 10% of video gaming youngsters display behavioral signs
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