Find the population mean and standard deviation

Reference no: EM1372856

Q. Numerous studies have been dedicated to investigate the relationship between juvenile delinquency and poor verbal abilities. Suppose that scores of verbal intelligence Quotient (IQ) test have a population mean µ=107 and a population standard deviation 15.

a. What shape would you expect the sampling distribution of x bar for n=84 juveniles to have? Does your answer depend on shape of the distribution of verbal IQ scores for all juveniles?

b. Assuming that the population mean and standard deviation for juveniles with no record of delinquency are the same as those for all juveniles, approximate the probability that the sample mean verbal IQ for n=84 juveniles will be 110 or more. Situation any assumptions you make.

c. In one study cited "the researchers found that a sample of n=84 juveniles with no record of delinquency had a mean of verbal IQ of x bar = 110", Considering the answer to part b, do you think that the population mean and standard deviation for nondelinquent juveniles are the same as those of all juveniles. Give an analytical explanation.

Reference no: EM1372856

Questions Cloud

Calculating expected profit : Assume you are one of two manufactures of tennis balls. Both you and your competitor have zero marginal costs. Total demand for tennis balls is

The statement building an internally consistent job : the statement Building an internally consistent job structure is burdensome to companies and In its place it is best to simply define then evaluate the worth of jobs by surveying the market

Question related to public relations : Outline the steps you will take in drafting these business communications and this document can take the form of a list, flowchart, or web diagram.

What are some main strategies a project manager can use : What are some main strategies a project manager can use to avoid the escalation of commitment pitfall? Please briefly define each strategy and provide relevant examples

Find the population mean and standard deviation : What shape would you expect the sampling distribution of x bar for n=84 juveniles to have? Does your answer depend on shape of the distribution of verbal IQ scores for all juveniles.

Write script which outputs xhtml text : Write a script which outputs XHTML text that displays in the XHTML document a rectangle, an oval, an arrow, and a diamond using asterisks (*).

Find as well as share the vision statements of companies : Find as well as share the vision statements of five different companies and please discuss the following- Access the vision statements in relation to the frameworks presented

Nash equilibrium, aggregate payoff and dominant strategies : In a two player, one shot simultaneous move game each player can select strategy A or B. If both players select strategy A, each receives a payoff of $500.

Why is listening to walkmans more harmful : A(n) 84 g arrow is fired from a bow whose string exerts an average force of 110N on the arrow over a distance of 80cm. What is the speed of the arrow as it leaves the bow.

User Account

All Pages