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Post your response to the following questions and participate in the discussion with your fellow students during the week. Your response must include StatCrunch outputs to support your answers.
Discussion
1. What is the difference between dependent and independent samples? Discuss differences is statistical treatment, statistical power, and data management.
2. For the following cases, determine whether the sampling is dependent or independent. Explain your conclusion.
1. Fifty married couples were randomly selected. The husbands and wives were placed in separate rooms. They were then given a questionnaire to assess the strength of the couple's relationship. The researchers wanted to know if there is a difference in the perception of the women versus the men.
2. A group of seventh-graders at Jefferson Middle School were given a presentation on the dangers of drug use. Both before and after the presentation, the students were asked to indicate (on a scale of 1 to 100) the likelihood that they would ever use illegal drugs in the future. School officials wanted to assess the effectiveness of the presentation as a drug abuse prevention tool.
Find the product of the vector of state probabilities for the preceding period and the matrix of transition probabilities.
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
Explain this result (including the underlying logic of the computations) to a person who understands hypothesis testing involving a single sample and a known population, but knows nothing about t tests.
a recent survey asked how many people they associatd with since they moved to chicago. the mean 6 and mode 1 16 of
If there is one-year warranty on the equipment, what proportion of the customers will actually make a valid warranty claim?
The firm's best assessment is a .3 probability of strong demand. the expected value of perfect information about demand is?
Make up a scatter diagram with 10 dots for each of the following situations: (a) perfect positive linear correlation, (b) large but not perfect positive linear correlation,
At the 5% significance level, can the station conclude that the mean age of its listeners is not 25 yrs. Formulate and test the appropriate hypotheses. Use the critical value approach.
Estimating the individual score using normal distribution - blood pressure higher than what amount?
What is the probability that among 10 true hypertensives at least 50% are being treated appropriately and are complying with this treatment?
The following is the number of minutes to commute from home to work for a group of automobile executives.
Suppose that 20% of the homes in a neighborhood has a swimming pool in their backyards and 50% has a garage. 15% of homes have both a garage and a swimming pool.
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