Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative advantages/disadvantage of using one over...

Compare and contrast the following measures of dispersion (range, standard deviation) in terms of what each of these represent and in terms of the relative advantages/disadvantage of using one over...

trying to get the difference between prospective and retrospective

Customers have the probabilities of 0.5 for HuluPlus, 0.2 for Cable TV, and 0.3 for the Times to convert after seeing an ad. The costs of advertising are also different: it is $2/ad, $3/ad, and $0...

The brand new video scoreboard at Wrigley Field in Chicago requires a special computer component that burns out somewhat frequently but is easily replaced. There are 100 of the components to be used,...

A spinner has 10 equally sized sections, 1 of which is red and 9 of which are blue. The spinner is spun and at the same time a fair coin is tossed. What is the probability that the spinner lands on...

An employer interviews 9 people for 5 management positions in a company, and 4 of the 9 people are women. If all 9. are qualified, in how many ways can the employer fill the management positions if...

The area to the right of zequals=negative 1.42−1.42 under the standard normal curve is nothing.

the incoming cohort of juveniles in a new diversion program consist of 80 males and 120 females. Of this cohort, 140 graduate early. what is the proportion of male participation in the program?

In a population of voters, 30% favour an election issue, and 70% do not favour it. In a survey it is found that 40% of those who favour the issue vote for the ruling party, while 80% of those...

need help figuring it out

An employer interviews 9 people for 6 management positions in a company, and 4 of the 9 people are women. If all 9 are qualified, in how many ways can the employer fill the management positions if...

Teachers’ salaries in one state are very low, so low that educators in that state regularly complain about their compensation. The state mean is $33,600, but teachers in one district claim that the...

Suppose the horses in a large stable have a mean weight of 818lbs , and a variance of 3481 .What is the probability that the mean weight of the sample of horses would differ from the...

3 of 4 6. In order to ensure that there is not a large disparity in the quality of education at various schools in a school district, the school board wants to make sure that the variance...

The result of an exam score for a given class is normally distributed.

On a questionnaire designed to measure empathy, the mean score for the general population is 30.6. Random sampling of 25 scores obtained from individuals who were bullied yielded a mean of 39.5 and...

The assumption of the F test for comparing two variances is that both populations are normally distributed. Why would validating these assumptions be a matter of statistical ethics? Is validating...

Set up the criteria for making a decision. That is, find the critical value using an alpha = .05. (Make sure you are sign specific: + ; - ; or ± ) (Use your tables) -1.645 ±1...

I am in a bsic statistics class. need help solving the word problems

Three research department have 9,10 and 8 members respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done...