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Is there any difference between the proportion of americans who wish they were rich and the proportion of canadians who wish they were rich? A random sample of 1,000 americans showed that 550 wish they were rich, while a ranndom sample of 500 canadians showed that 225 wish they were rich.
A. Test, at the 1% level of significance, whether the two population proportions are significantly different. Formulate and test the appropriate hypotheses. Use the critical value approach.
Draw a tree diagram representing the data. What is the probability that a vehicle stolen in this city will never be recovered?
To determine whether two categorical variables are independent, one should use the:
jacks game preserve is stocked with 30 moose 25 elk and 45 deer. five years later a sample of animals yields 90 moose
If this poll had been based instead on 5000 adults, do you think the "95% confidence interval" would be wider or narrower than the interval given?
Is there evidence of violations of the usual ANOVA assumptions of equal variances and normal populations? Set up and perform appropriate TESTS at the α = 0.05 level of significance.
Calculate the profit earned/loss incurred on; a high performance tire that exceeds 40,000 miles, a high performance tire that does not exceed 40,000 miles.
Perform the appropriate test of hypothesis to determine whether Kim's average time has changed. Use alpha=.01. Compute the power of the test if Kim's actual mean swimming time is 147.3 seconds. Interpret the results.
A math course has 2 sections. Section one has 55 students of which 10 received an A. Section two has 45 students of which 11 received an A. If a student was chosen randomly from 100 students
an american roulette wheel has 38 slots 18 are red 18 are black and 2 are green. let r be the number of spins until you
The lengths of human pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. What is the probability that a pregnancy lasts at least 300 days?
The variable Z has a standard Normal distribution. Find the number z that has cumulative proportion 0.85.
Determine the average amount of time that a guest spends checking in. How would this change under each of the state options?
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