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An aeroplane flies from A to B at the rate of 500km/hr and comes back from B to A at the rate of 700km/hr. What is the average speed of aeroplane?
The purchase of a coin-operated laundry is being considered by a potential entrepreneur. The present owner claims that over the past 5 years the average daily revenue has been $675 with a standard deviation of $75.
This sample has a mean weight of 5.03 Kg and a standard deviation of 0.21 Kg. Can we calculate that the mean weight produced by the machine has increased? Use 5% level of significance.
Percentage who say "Yes" from 7% to 3.5%? Explain to someone who knows no statistics the advantage of taking a larger sample in a survey of opinion.
In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 13 patients using the drug is selected. Find the probability that: exactly three will have this mild side effect.
hypothesis testing is one of the mainstays of medical research literature. you would be hard-pressed to find a research
a government agency has specialists who analyze the frequencies of letters of the alphabet in an attempt to decipher
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
Please perform a hypothesis test using a .05 significance level on the following information. Next please perform a regression analysis as well as providing a scattered diagram.
The purpose of this assignment is to develop models that can be used to predict the specific variable:frequency of going to a fast food restaurant (FFR), q2
We then counted the number of statements in the summary that can be classed as inferences. Assume inferences are interval measurement.
A sample of 200 such candies is randomly selected. Find the mean and the standard deviation for the number of orange candies in such groups of 200.
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
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