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Given a sample size of 65, with sample mean 726.2 and sample standard deviation 85.3,
we perform the following hypothesis test.
H0: μ = 750H1: μ < 750
What is the conclusion of the test at the α = 0.10 level? Explain your answer.
Time spent using e-mail per session is normally distributed, with μ = 8 minutes, and σ = 2 minutes. If you select a random sample of 25 sessions,
An aquarium tank can hold 7700 liters of water. There are two pipes that can be used to fill the tank. The first pipe alone can fill the tank in 77 minutes.
Whats the most appropriate procedure for evaluating the relationship between tenure and divorce and what is the correlation and how can it be interpreted in terms of magnitude, direction and practical importance?
In a survey of the 3000 boy scouts in the National Capital Area Council (NCAC), it is found that they have a mean weight of 135 lbs with a standard deviation of 15 lbs. How many of the boy scouts have weights between 120 lbs and 150 lbs.?
A catering company is buying equipment in order to set up their own store. They have a choice of two ovens that they can purchase for the store.
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Compute the within group variability. Do you require any post hoc testing? Why or why not? Decribe in detail.
A sample of eight male professionals has an average yearly salary of $52,165. Find the average yearly salary for the 11 people.
The politician's advisors estimated the proportion supporting her fiscal policy to be .60. How large of a sample is required?
Assume that a random variable, x, is distributed according to a normal distribution with mean 12 and standard deviation 2. Find the z-value if:
In the past, of all the students enrolled in "Basic Business Statistics" 10% earned A's 20% earned B's, 30% earned C's, 20% earned D's and the rest either failed or withdrew from the course.
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