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Find a 95% confidence interval for the proportion of all large customers who pay bills of at least $1000 at least 15 days after they are billed.
If the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be to reject 0 H?
The overhead reach distances of adult females are normally distributed with a mean of 202.5 cm and a standard deviation of 8.6cm.a. Find the probability that an individual distance is greater than 212.50cm.
Investors use probabilities to decide among several potential investments and calculate potential returns, or losses. An investor has the possibility to invest $2 million in three different schemes.
you arrive to a trolly stop just missing the last trolly. the time until the next rolly arrival is modeled as a u46
a population has u100 and sigma20. if you select a single score from this populaton on the average how close woud it be
Gallup Polls When Gallup and other polling organizations conduct polls, they typically contact subjects by telephone. In recent years, many subjects refuse to cooperate with the poll.
Does the confidence interval contain the value of 35 mm, which is believed to be the standard deviation of sitting heights of women?
They are thinking of introducing a new flavour, maple-marshmallow Frumpies, and want to know whether children will prefer the new flavour to the old one. Design a completely randomized experiment to investigate this question.
question a market researcher wants to test to determine if families of four in city a spend less per week on average
Bags of cookies that have weights in the upper 7.5% are too heavy and must be repackaged. What is the most a bag of cookies can weigh and not need repackaging?
suppose you hear anold-timer say why in my day kids were much more respectful and didnt caue as much trouble as they do
Suppose R is an orthogonal n×n matrix. If U is an n×1 vector of IID N(0, σ2) variables, show that RU is an n×1 vector of IID N(0, σ2) variables. Hint: what is E(RU)? cov(RU)? ("IID" is shorthand for "independent and identically distributed.")
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