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In 2010, 65% of adult Americans thought that the death penalty was morally acceptable. In a poll conducted by the Gallup Organization, a simple random sample of 1005 adult Americans resulted in 704 respondents stating that they believe the death penalty was morally acceptable when asked, "Do you believe the death penalty is morally acceptable or morally wrong?" (The choices, "morally acceptable" and "morally wrong" were randomly interchanged in the question for each interview.) Is there significant evidence at the 5% level of significance to indicate that the proportion of adult Americans who believe the death penalty is morally acceptable, has increased from the level reported in 2010?
The number of passengers on the Carnival Sensation during one-week cruises in the Caribbean follows the normal distribution.
Derive the probability that a receptor is occupied by a ligand using a model which treats the L ligands in solution as distinguishable particles.
Calculate the probability that the median of the sample or average medians is:
Cores on two tests have a bivariate normal distribution; and that correlation of 2 scores is 0.8. Determine the probability that sum of the student's scores on 2 tests will be greater than 200?
Suppose we have the following information from a simple regression: What is the coefficient of determination? What is the correlation coefficient?
The 'interaction effect' was also important. By using the means in the table above write a statement explaining how the anti-anxiety drug appears to affect anxiety. Are the outcomes consistent with the hypothesis proposed by the researchers?
You calculate the difference in income as (after incentive plan - before incentive plan). You want to test whether income after the incentive plan is different from income before the incentive plan. What are the hypotheses for this test?
How would you interpret the findings of a correlation study that reported a linear correlation coefficient of -1.34? a) strong linear correlation b) weak linear correlation c) impossible, d) calculation error no linear correlation
What is the 95% confidence interval for the difference between the mean prices of the two models?
The population mean annual salary for first year faculty at SLU is $47,000. Assuming that the population standard deviation is $1800:
Estimating the combined mean values for the given data - find the mean for the combined sample
Find the probability that a standard normal random variable will assume a value between: Find a z such that 70% of the area is above that value.
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