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Assume that you have a sample of n1 = 7?, with the sample mean x¯1 = 45?, and a sample standard deviation of Upper S1 = 5?, and you have an independent sample of n2=4 from another population with a sample mean of Upper x¯2 = 38 and the sample standard deviation Upper S2 = 6. Assuming the population variances are? equal, at the 0.01 level of? significance, is there evidence that μ1>μ2??
Find the test statistic.
tSTAT =
?(Round to two decimal places as? needed.)
Assume that you purchased an 8 percent, 20-year, $1,000 par, semiannual payment bond priced at $1,012.50 when it has 12 years remaining until maturity.
A researcher develops a new theory that predicts that vegetarians will have more of a particular vitamin in their blood than non-vegetarians.An experiment is conducted and vegetarians do have more of the vitamin, but the difference is not signific..
What is the probability of there being two or more customers in the system?
Develop hypothesis, conduct analyses as you deem necessary, and prepare a page report of your findings. Papers will be evaluated in terms of their accuracy of analysis and interpretation, completeness, and quality of writing.
Find and graph the sample regression line of y on x and the given data as points on the same axes. Show the details of your work.
Let X be normally distributed random variable with μ = 100 and σ = 10. Find the probability that X is between 75 and 100.
X(t)is a wide sense stationary random process with average power equal to 1. Let ? denote a random variable with uniform distribution over [0, 2π] such that X(t) and ? are independent.
How many circles of Cheerios in a cereal box represents what kind of distribution?
The sales manager had predicted, before the business started, that year 1's sales would be 410 air conditioners. Using exponential smoothing with a weight of alpha = 0.30, develop forecasts for years 2 through 6.
What is the expected value of playing roulette if you bet $18 on red ?
(a) What is the shape of this sampling distribution? [How do you know?] (b) What is the mean of this sampling distribution? (Give your answer correct to one decimal place.)
The team wins 50 percent of their night games and 90 percent of their day games. According to today's newspaper, they won yesterday. What is the probability the game was played at night?
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