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How many degrees of freedom for Between Groups calculation? How many degrees of freedom for in Groups calculation?
A study of 22,000 male physicians was conducted to find if taking aspirin daily reduces the chances of heart attack. Half of physicians were given a regular dose of aspirin while the other half was
Of those vaccinated with Salk vaccine, 3 later developed polio. Of those receiving the placebo, 115 later developed polio. Test the claim that Salk vaccine is effective in lowering polio rate. Emplo
Scores on standford-binet intelligence scale have a mean of 100 and standard deviation of 16, and are presumed to be normally distributed. A person who scores 68 on this scale has what percentile ra
A statistics teacher recently adopted new textbook. At the completion of course, 100 randomly chosen students were asked to determine the book. The results showed:'
Match the proposed probability of A with the appropriate verbal description.
Develop a 95% confidence interval for the true mean weight of all adult men. Also a 90% and 99% CI. How many adult men would you need to sample to ensure that the maximal margin of error for the 95%
If each hunter independently hits his target with probability .6, calculate the expected number of ducks that are hit. Suppose that the number of ducks in flock is Poisson random variable with mean
A study comparing resting heart rate of four different kinds of elite athletes recruited: 10 cyclists, 10 triathletes, 10 soccer players, and 10 baseball players. The resting heart rate of each and
Carry out a t-test for dependent means to determine if there is a difference between the regular spandex suit and the Fastskin bodysuit in terms of performance.
A multiple choice quiz include 10 questions, each with four possible answers. Determine the mean for the number of correct answers, if a student guesses on each question.
A pet store orders three parakeets from this supplier. If the supplier chooses the parakeets at random, determine the chance that pet store gets exactly one blue parakeet?
There're 400 students in Tsing Hua University undergraduate level, which 95 of them had learned or are learning to play guitar. Let p be the proportion of Tsing Hua University students who had learn
The random walk model employed to discuss gas diffusion can be treated as a binomial distribution similar to coin flips with 50/50 chance that a particle will move in either the +x or the -x directi
Can someone discuss how regression can be employed to make predicitions when applying statistics to real-world decisions?
A bookcase haves three statistics books and 5 biology books. If 2 books are chosen at random, the chance that both are statistics books.
A school administrator says that standard deviation of test scores for eighth grade students who took a life science assessment test is less than 30.
A current poll found that 30% of those surveyed are worried regarding aggressive drivers on road. If three people are chosen at random, that is the probability that all three will be worried regardi
A study was carried out to find out if curing temperature significantly affects the tensile strength of silicone rubber. An axially controlled automated hydraulic force applicator was employed to me
You decide to test this claim, and ask random sample of 250 U.S. adults whether they have ever seen extraterrestrial being. Of those surveyed, 8% reply "yes." At a 0.01 level of significance, is the
A statistics teacher recently adopted the new textbook. At completion of the course, 100 randomly chosen students were asked to evaluate the book. The results showed:
The powerball lottery consists of selecting 5 numbers (1-56) and a powerball number (1-46). What are the odds of selecting the correct set of six numbers with one ticket?
Test at the 1% significance level against appropriate one-sided alternative null hypothesis that job satisfaction has no linear effect on absenteeism.
Find out a single sampling plan with inspection level II, for an AQL = 1% and a lot size N=1,000 production units under:
In the United States there is strong relationship between smoking as well as education with well-educated people less likely to smoke. A study in France included sample of 459 men who were chosen at