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What conditions must be satisfied in order to construct a confidence interval on binomial parameter p? Construct a 95 percent confidence interval for the population proportion, p, of non-smokers.
Can we be sure that each outcome in the sample space is equally likely? Explain. If two marbles are drawn from the box, list the sample space.
He also recorded speeds of a random sample of 53 silver cars on a highway to find a mean of 69.02 mph and a variance of 8.84. Calculate the t-statistic for a test of the difference between the two s
According to Chebychev's theorem, what percentage of a distribution will be within k = 3.2 standard deviations of the mean? (Give your answer correct to one decimal place.)
Use the binomial table to find the numerical value of alpha for this testing procedure. Use the binomial table to find the probability of rejecting the null hypothesis when using this rejection region
Find the probability that the mean age of a sample of 25 randomly selected doctors is less than 44.32 years. Why is there a difference in the two answers?
Michael Sullivan, son of the author, decided to enroll in a reading course that allegedly increases reading speed and comprehension. Prior to enrolling in the class, Michael read 198 words per minut
The high school dropout rate in the state in the state for the year 2000 was 10.8% One school district who adopted the use of the nonprofit's tutoring program and whose dropout rate has always been
What is the probability that an average christmas spending for a sample of 500 families differs from the average by less than 15 dollars? (assume normal distribution)
In order to justify the price marketing wants, the wax need to be very fast. Specifically, the mean time to finish their standard test course should be less than 55 seconds for a former olympic cham
Verify that it is reasonable to use the t-distribution to perform a test about the average age of driftwood along this beach. Test, at the 5% level, if thers is evidence that the average age of drift
Construct a 95% confidence interval for the mean gas price in Illinois ( on August 8,2012). Round your margin of error to three decimal places.
Test, at the 10% level, if there is evidence that the proportion of college graduates that believe in evolution differs significantly from the proportion of individuals with some college education t
In a gallop poll of 1038 randomly selected aduls 18 or older, each subject was asked a question: "In general, how harmful do you feel secondhand smoke is to adults?" The subjects were given these ch
Suppose we take random samples of 100 individuals who earned a doctorate in the physical sciences in 2010 and 100 individuals who earned a docotrate in the social sciences in 2010. Find the mean and
One engineer firm enjoys 40% success rate in getting state government construction contracts. This month they have submitted bids on eight construction projects to be funded by the state government.
What is the null hypothesis? Find the z-score of the observed proportion calculate the value of the test statistic. z =
Please discuss the role of residual plots (order and fits) regarding the least squares method in multiple regression.
Please explain what Minitab does in backward elimination and in stepwise (forward and backward) automatic regression procedures.
The guidance system for a rocket operates correctly with probability p when called upon. Independently but identical buckup systems are installed in the rocket so that the probability that at least
The NBA sample mean minues the high school sample mean is 3.2. He creates a randomization test to show this theory, uing the test stats described above. what is the p-valuve? round to the nearest pe
A confidence interval is desired for the true average stray-load loss u (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume that st
What are the assumptions necessary for hypothesis testing when using the method of least square in multiple regression? Please state the complete model.
A fair six sided die is rolled 10 times. Calculate the expected value of the sum of the numbers observed. Then compute the variance for the sum.