1. A city instituted an educational program that hopefully would reduce the number of violent crimes...

1. A city instituted an educational program that hopefully would reduce the number of violent crimes committed in the city. The program is quite expensive, so the city wants to make sure that it is worthwhile. In the past (before the educational program was tried), the city experienced 5.2 violent crimes per day, on average. A few months after trying the educational program, the city randomly sampled 60 days and found the average of 4.5 violent crimes. Assume that the standard deviation is known to be 2.7 crimes. The city wants to conduct a hypothesis test at a 5% significance level to determine if the data provide convincing evidence that the educational program is effective in reducing violent crimes in the city.

(explanation please)

(a) Check the required conditions for a hypothesis test to determine if they are satisfied.

(b) Describe, in words, what ?? would represent in this case.

(d) Using the sample data, calculate the test statistic.

(e) Using the test statistic in (d), calculate the p-value.

(f) Using the p-value in (e), determine whether the city would reject the null hypothesis OR fail to reject the null hypothesis at a 5% significance level.

(g) Write an appropriate conclusion in the context of the problem.

Solutions

Expert Solution

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Question 1- Causes of Violent Crimes Which of the four categories of causes of violent crimes...

Question 1- Causes of Violent Crimes Which of the four categories of causes of violent crimes do you agree has the most impact? (biological, socialization, cognitive and situational factors) Why? Please use information from trusted sources to back up your rationale. Please give 2 different examples of situations/ influences that could potentially impact the category that you chose and why.

Exhibit 1: We have the following information about number of violent crimes (Y) and the number...

Exhibit 1: We have the following information about number of violent crimes (Y) and the number of police personnel (X) for a certain year for a sample of three metropolitan areas. We also know the following statistics: SST = 1250, SSE = 937.5 Crime (Y) Police Personnel (X) 300 5000 325 3000 350 4000 Question 6 To answer this question, refer to Exhibit 1 in question 1. What does value of r2 tell you? A. 25 percent of variation in...

Table 3.3 Educational parameters in the Green Valley City in a decade (Number of students in...

Table 3.3 Educational parameters in the Green Valley City in a decade (Number of students in each level) Month 1995 2005 2015 Preschool 423 657 814 Basic education 567 886 1206 Secondary education 456 678 1200 College 678 987 2088 Graduate Schools 12 68 208 (You need to change the table into a suitable graph/chart) Convert the information shown into a (graph / chart) and write in each of them a text of approximately 150 words explaining the drawing

2. How can we reduce the number of private vehicles in the city, and what are...

2. How can we reduce the number of private vehicles in the city, and what are the benefits of this approach? based on engineer and society subject pls elaborate it not more than 5 pages pls include the reference also

1. How were the Young Lords' breakfast program, health program, daycare program, and educational program a...

1. How were the Young Lords' breakfast program, health program, daycare program, and educational program a reaction to the economic conditions of their communities? 2.How would the Young Lords’ programs have impacted Aggregate Demand and Aggregate Supply in their target communities?

Question 1: Some political leaders would like to reduce the number of marginal tax brackets, but...

Question 1: Some political leaders would like to reduce the number of marginal tax brackets, but how many federal income tax brackets are there today? 1 9 5 3 7 Question 2: All of the following “adjustments” are commonly subtracted from a person’s total income (up to certain limits) and therefore are not included in a person’s adjusted gross income EXCEPT: Contributions to IRAs (Individual Retirements Accounts) Penalties for early withdrawal of savings Mortgage interest paid Student loan interest Moving...

A composition teacher wishes to see whether a new grammar program will reduce the number of...

A composition teacher wishes to see whether a new grammar program will reduce the number of grammatical errors her student make when writing an essay. the data are shown below. At a=0.05 can it be concluded that the number of errors has been reduced? Student- 1, 2, 3, 4, 5, 6, Errors before- 12 9 0 5 4 3 Errors after - 9 6 1 1 2 5

A composition teacher wishes to see whether a new grammar program will reduce the number of...

A composition teacher wishes to see whether a new grammar program will reduce the number of grammatical errors her students make when writing a two-page essay. The data are shown here. Student 1 2 3 4 5 6 Errors before 12 9 0 5 4 3 Errors after 9 6 1 3 2 3 a. To find the 95% confidence interval for μd., what critical value should be used? b. Find the 95% confidence interval for μd.

Please show steps An Educational Psychologist would like to know the relationship between the number of...

Please show steps An Educational Psychologist would like to know the relationship between the number of hours per week that students study for a course and their performance in the test. a) Compute the Pearson correlation of the data below b) Determine the significance of the correlation at α .05, two-tailed by referring to Table B.6 in the Appendix of your textbook. State whether the correlation is significant. c) Confirm the Pearson correlation by ranking the number of hours of...

Suppose Boston wants to reduce childhood obesity. As part of its plan, the city would impose...

Suppose Boston wants to reduce childhood obesity. As part of its plan, the city would impose a tax on sugary drinks like soda, Gatorade, etc because their consumption has been associated with childhood obesity, however, the tax would be applied statewide. The tax would be paid by suppliers. According to standard economic theory, how would the tax affect the market equilibrium price and quantity of soda sold in Boston? Do you think the tax would be effective in reducing childhood...

Subjects