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You are an engineer for Bulbs ‘R Us, and you've developed a lightbulb that you claim consumes less than 5 watts per hour (wph). You want to conduct a test to prove that you're right. What is the null hypothesis and the alternative hypothesis?
Provide an example and explain. Why do statisticians play only a limited role in deciding whether statistical significance requires a business action?
The manager of Sam's Food Mart guarantees that none of his cartons containing a dozen eggs will contain more than one bad egg, despite the fact that 4% of individual eggs are known to be bad. Define the random variable x to be the number of bad eg..
Estimated the probability that among 75 randomly selected students, at least 20 of them score greater than 78.
a random sample of 300 citibank visa cardholders accounts indicated. a sample mean debt of 1220 with a sample standard
you have been recently hired as a marketing analyst in an advertising agency. you are assigned the task of assessing
use a table of cumulative areas under the normal curve to find the z-score that corresponds to the given cumulative
Given the same significance level, a ________ value of t will be required to reject the null hypothesis compared to the value of z required for rejection.
If the standard deviation of the amount of coffee dispensed is 0.4oz and the amount of coffee dispensed is normally distributed.
A library checks out an average of 250 books per day, with a standard deviation of 75 books. If a sample of 36 days of operation is selected and the sample mean is computed,
let X have one of the following distributions: if the prior probabilities are P(H0)= P(HA) which outcomes favor H0? What prior probabilities correspond to the decision rules with a= 0.2 and a =0.5
Find the probability that the first marble drawn was blue given that the second marble drawn was red and what is the range space RY of this new random variable Y and give the probability distribution of Y in tabular form
What is the probability that at least one of the eight shuttle missions scheduled next year results in a critical-item failure?
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