Reference no: EM131797424
Parental Training and Criminal Behavior of Children
In Montreal, Canada, an experiment was done with parents of children who were thought to have a high risk of committing crimes when they became teenagers.
Some of the families were randomly assigned to receive parental training, and the others were not.
Out of 43 children whose parents were randomly assigned to the parental training group, 6 had been arrested by the age of 15.
Out of 123 children whose parents were not in the parental training group, 37 had been arrested by age 15.
a. Find and compare the percentages of children arrested by age 15. Is this what researchers might have hoped?
b. Create a two-way table from the data, and test whether the treatment program is associated with arrests. Use a significance level of 0.05.
c. Do a two-proportion z-test, testing whether the parental training lowers the rate of bad results. Use a significance level of 0.05.
d. Explain the difference in the results of the chi-square test and the two-proportion z-test.
e. Can you conclude that the treatment causes the better result? Why or why not?
(Source: R. E. Tremblay et al. 1996. From childhood physical aggression to adolescent maladjustment: The Montreal prevention experiment. In R.D. Peters and R. J. McMahon. Preventing childhood disorders, substance use and delinquency. Thousand Oaks, California: Sage, pp. 268-298.)
|
Environmental management program present ocean
: With respect to reputational risk, does Ocean Spray's existing environmental management program present Ocean Spray in a positive manner?
|
|
Perform a chi-square test of homogeneity on this data set
: The table shows statistical information on recorded live births in the Republic of South Africa in different years.
|
|
What is the firm-specific risk of portfolio
: Assume you create a portfolio Q, with investment proportions of 0.40 in a risky portfolio P, 0.35 in the market index, and 0.25 in T-bill.
|
|
Large portion of the retail book market
: Online booksellers have captured a very large portion of the retail book market over the past several years.
|
|
Find and compare the percentages of children arrested by age
: In Montreal, Canada, an experiment was done with parents of children who were thought to have a high risk of committing crimes when they became teenagers.
|
|
How many units did the company sell
: If net income using variable and full costing was $245,000 and $205,700, respectively, how many units did the company sell in 2007
|
|
What advantage does the two-proportion z-test have over
: Create a two-way table from the data and do a chi-square test on it, using a significance level of 0.05.
|
|
What will be the firm cash cycle in given problem
: Suppose that Ken-Z Art Gallery has annual sales of $890,000, cost of goods sold of $580,000, average inventories of $166,000, average accounts receivable.
|
|
Discuss about the use of steroid inhalers for asthma
: Eosinophils are a form of white blood cell that is often present in people suffering from allergies.
|