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A sample of 27 items provides a sample standard deviation of 10. Test the following hypotheses using α = .10. What is your conclusion? Use both the p-value approach and the critical value app
Can the methods of this section be used to construct a confience interval estimate of the standard deviation of the population of all outcomes? Why or why not?
Fit a linear regression model of swimming time as the response and week as the explanatory variable. To formulate your prior, use the information that competitive times for this age group generally.
Run a Gibbs sampling algorithm to approximate the posterior distribution of {θ,σ2, µ, τ^2}. Assess the convergence of the Markov chain.
Each wine was scored on a 40 point scale with the highest score representing the excellence of the wine. Why is the use of an ANOVa test not appropriate and what will ANOVA miss?
Construct and interpret a 95% confidence interval estimate of the difference in the mean number of pages devoted to advertisements in men's magazines between may 2008 and May 2009
Calculate the difference in the average clutter between network and cable television. Which standard deviation would lead you to conclude that there was a major difference in the two clutter averages?
Assuming that the population variances are equal, is there evidence that the mean crack size is smaller for the unflawed specimens than for the flawed specimens?
It is hypothesized that the number of bottles of an imported premium beer sold in city restaurants depends linearly on the average cost of meals in these restaurants. Interpret the slope of the samp
Test at the 5% level the null hypothesis that the population mean impurity concentration is 2% or less against the alternative that it is more than 2%.
Describe why knowing the type of variable matters when performing calculations or drawing graphs with data. Please share 3 examples of something that does not have an inherently normal distribution of
A convenience store owner believes that the median number of lottery tickets sold per day is 49. A random sample of 20 days yields the data below. Find the critical value to test the owner's claim.
Lean body mass (your weight leaving out fat) helps predict metabolic rate (how many calories of energy you burn in an hour). slope of the regression line is?
The data was used to make inferences regarding students taking other sections of the same course. Compute 95% confidence intervals. What does this tell us?
Compute a 95 percent confidence interval for this data. What does this information tell you about a particular individual's stage IV sleep?
The level of salmonella is normally distributed, so they did a test of hypothesis to determine whether the mean level of salmonella in ice cream is greater than .3. Determine the test statistics and
The sample mean is 95 and the sample standard deviation is 12. Construct a 99% confidence interval for μ, the population mean score for Abraham Lincoln High.
Construct a 90% confidence interval to estimate the actual proportion of people who smoked in the United States in 2010.
According to a study by decision analyst. what is the probability that more than 150 credit card users are very close the total limit on their card(s)?
What is the probability of a randomly selecting a sample of 50 one bedroom apartments in San Antonio and getting a sample mean of less than $530.
Steve Steward from Over The Hill airlines rushes in and randomly selects 15 meals for the flight he is about to take. What is the probability that at least five people will be able to eat fish on St
We can describe this process via a continuous-time Markov chain model where the states are the number of pending requests. Give the steady-state balance equations.
Show the transition probabilities 2. Find the probability that the first future loss will be followed by another loss. 3. Let X be the number of games played up to, but not including the first loss.
the probability that he/she is Casual is 95%. Finally, suppose 10% of fans are Rabid. What is the probability of any fan watching the game at Home?
Suppose the answer to part a is 23.5 (it is not, but assume it is to do part b). If the true value of efficiency in the population is 22.75, what is the power of this hypothesis test?