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The time it takes a student to finish a electronics test has a uniform distribution between 50 and 70 minutes.
(1) What is the probability density function for this uniform distribution?
(2) Find the probability that a student will take more than 60 minutes to finish the test.
(3) Find the probability that a student will take no less than 55 minutes to finish the test.
(4) Find the probability that a student will take exactly one hour to finish the test.
(5) What is the median amount of time it takes a student to finish the test?
(6) What is the mean amount of time it takes a student to finish the test?
A meat processing plant has processed an average of 100 tons per day for the last several years. Newer processing machines have been installed recently.
Find a 90% confidence interval for the population mean weight of all such turtles.
Using the above database, compute a t-test comparing males' and females' heights. You must determine which type of t-test to compute. Write a short interpretation of the results.
Convert each of the following z intervals to x intervals.
You are the manager of a softball league in the locality in which there are 5 local teams with 10 people each. The league has been arranged for parity so that each local team has 5 good players and 5 bad players.
According to a report by Scarborough Research, the average monthly household cellular phone bill is $73. Suppose local monthly household cell phone bills are normally distributed with a standard deviation of $11.35.
What test can be performed to compare the percentage of participants who developed abnormal triglyceride levels between the vitamin A group and the trace group? Implement the test in Problem 10.68, and report a two tailed p value.
The incubation time for Rhode Island Red chicks is normally distributed with a mean of 21 days and standard deviation of approximately 1 day.
Describe a where you might want to use a dummy variable in a multiple regression. What would the dummy variable buy you in that situation?
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
Write the hypothesis statement. What distribution are you using?
Find out the constant using probability density function also cumulative distribution function. Assume X be a continuous random variable with probability density function.
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