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Situations comparing two proportions are described. In each case , determine whether the situation involves comparing proportions for two groups or comparing two proportions from the same group.
a) Compare the proportion of U.S. adults who have a positive opinion about the media and the proportion of U.S. adults who have a negative opinion about the media.
b) Compare proportion of milk chocolate M&M's that are blue to the proportion of milk chocolate M&M's that are green.
c) Compare the proportion of female students at a university who play a sport to the proportion of male students at a university who play a sport.
According to the Insurance Institute of America, a family of four spends between $400 and $3800 per year on all types of insurance. Suppose the money spent is uniformly distributed between these amounts.
in the united states a full-time employee works an average of 40 hours a week with a standard deviation of 2.5 hours
One flight daily to a certain destination. The following information shows the probability distribution of late arrivals for that flight in the past month:
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. State the null hypothesis and the alternate hypothesis.
Choose any Markov Chain with a 3x3 transition matrix that is irreducible and aperiodic. The reason it needs to be irreducible and aperiodic is because we are looking for a Markov Chain that converges.
Using binomial distribution find the probability that 2 or 3 women in a sample of 20 will never be married.
question following are the scores on a teacher certification test administered prior to hiring x and the principals
That's a much larger sample than standard sample surveys. In spite of this, we can't trust the result to give good information about any clearly defined population. Why?
Suppose that X1,..,Xn form a random sample from the normal distribution with unknown mean M and unknown standard deviation S, and let m and s denote the MLEs of M and S. for the sample size n=17, find a value of k such that P(m > M +ks) = 0.95
probability based on normal distribution.1.determine the area under the standard normal curve that lies to the left of
suppose the sample size from the normal population is 11. also assume that the population standard deviation is
a wildlife study has found that a wolf pack is successful in killing one large animal for every 12 that it chases.a
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