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A statistics instructor collected data on the time it takes the students to complete a test. The test taking time is uniformly distributed within a range of 35 minutes to 55 minutes.
a. Determine the height and draw this uniform distribution
b. How long does the typical test taking time?
c. Determine the standard deviation of the test taking time.
d. What is the probability a particular student will take less than 45 minutes?
e. What is the probability a particular student will take between 45 and 50 minutes?
the number of cars that arrive in a certain mechanic shop is a poisson random variable with the parameter ? 1. for k ?
A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100. If this sample is being used to test a null hypothesis stating that m = 43, then what is the tstatistic for the sample?
Consider how you might apply radical expressions to your daily life. Explain this application, and discuss what the equation might be.
1.an inventor claims that a device increases gas mileage by 4. a test of the device was done by randomly selecting 10
a family has 8 children .they wants to take a photo of them sitting in a single line. in how many different ways can
You read that statistical test at α=0.01 level has probability 0.14 of making a Type II error when specific alternative is true. Calculate the power of test against this alternative?
From the past experience he knows that he population standard deviation is three days in testing to determine his blief he could use one of the following plans n=100 a=.01 n=75, a=.o5 n=50, a=.10.
Normal distribution with average 500 and SD 100. A college wants their students to be in the top 12.5% for verbal aptitude. What minimum qualifying score should they set?
What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)?
the department of natural resources reports that a fish is unsafe to eat if the polychlorinated biphenol pcb
a researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population
a super market analysed its most recent sales and determined the relationship between the way a customer paid for the
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