Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Applied Statistics Expert

1. In an article, a random sample of 42 felons convicted of “impulsive murder” was compared to a random sample of 40 felons convicted of premeditated murder. Both samples of felons were released from prison before completing the original sentence.  For the sample of 42 convicted of “impulsive murder,” 13 recorded parole violations. For the sample of 40 convicted of premeditated murder, 22 recorded parole violations.

Can the statistician infer at the 1% significance level that the proportion of parole violations is greater for the felons convicted of premeditated murder?

H0:
H1:
Test statistic:
Rejection region:
find outd test statistic:
Conclusion:

Estimate with 99% confidence the difference in population proportions.

2. In an important study centered on teenage smoking, a sample of 70 high school students in Edmonton claimed they smoked an average of 24.64 cigarettes per day, with a standard deviation of 9.23 cigarettes. A different sample of 70 high school students in Ontario claimed that, on average, they smoked 22.84 cigarettes daily, with a standard deviation of 8.75. At the 5% level of significance, test the hypothesis that the average number of cigarettes smoked per day is the same in both places.

H0:
H1:
Test statistic:
Rejection region:
find outd test statistic:

3. Briefly describe how you would diagnose each of the following conditions/problems related to regression analysis.

a) The potential for multicollinearity.
b) The probability distribution of the error variable is normal.
c) The mean of the distribution of the error variable is zero.
d) The standard deviation of the error variable is constant (i.e., homoscedastic)

4. With regard to an indicator such as infant deaths per 1,000 births, it is a pretty safe assumption that, as a whole, the developed nations in Europe, USA, and Japan statistically differ from the less developed countries in South America, the Middle East, and Asia. The problem is, do infant deaths per 1,000 in the less-developed countries in Latin America, the Middle East, and Africa differ?  The data below are reported by country in each region.

2221_infants death table.jpg

Conduct an analysis of variance for this data at the 5% level of significance.  For this problem, SST = 2547.30 and SSE = 56966.04.

H0:
H1:
Test statistic:
Rejection region:
find outd test statistic:
Conclusion:

5. An English teacher investigated some of the factors that affect an individual student’s final grade in his course. She proposed the multiple regression models:

124_regression model.jpg

Where,

y = final mark (out of 100)
x1 =  number of lectures skipped
x2 =  number of late assignments
x3 =  mid-term test mark (out of 100)

The teacher recorded the data for 50 randomly selected students. The computer output is shown below.

THE REGRESSION EQUATION IS:

y = 41.6 – 3.18 x1 – 1.17 x2 + .63 x3

593_regression equation.jpg

 ANALYSIS OF VARIANCE:

710_analysis of variance.jpg

a) Do these data provide enough evidence to conclude at the 5% significance level that the model is useful in predicting the final mark? describe.

b) Do these data provide enough evidence to conclude at the 5% significance level that the final mark and the number of skipped lectures are linearly related?  describe.

c) Do these data provide enough evidence at the 1% significance level to conclude that the final mark and the mid-term mark are linearly related?  describe.

d) What is the coefficient of determination?  What does this statistic tell you?

e) Interpret the coefficients b1 and b3.  Be specific.

Applied Statistics, Statistics

  • Category:- Applied Statistics
  • Reference No.:- M941

Have any Question? 


Related Questions in Applied Statistics

Corelation and regression all questions are from the class

CORELATION AND REGRESSION All questions are from the class data sheet. 1) Create a Pearson's (r) correlation coefficient using the computational formula from Chapter 14 (top of page 456). Correlate GPA with the number of ...

Week 7 linear regression exercisessimple regressionresearch

Week 7 Linear Regression Exercises Simple Regression Research Question: Does the number of hours worked per week ( workweek ) predict family income ( income )? Using Polit2SetA data set, run a simple regression using Fam ...

The initial research proposal will consist of the following

The initial research proposal will consist of the following SIX items: 1. Identify a business research topic 2. Define the research questions for the identified problem or opportunity 3. Select the appropriate research m ...

You are the manager for a medium size company the owners of

You are the manager for a medium size company. The owners of the company want to implement assessments into their employment procedures as well as with their current employers because they believe it will allow them to m ...

1 3 particles in a 1 dimenstional box-a a 1d particle in a

1. 3 particles in a 1 dimenstional box:- a. A 1D particle in a box has energy levels n with energy E n = (h 2 Π 2 n 2 ) / (2mL 2 ) where n is an integer from 1 to ∞. For an open system at k b T = (h 2 Π 2 ) / (2mL 2 ), e ...

In addition to solving the problems write a 3 - 5 page apa

In addition to solving the problems, write a 3 - 5 page APA formatted paper explaining the process that lead to the resolution. * Calculators may be used to check answers where calculators are part of assignments but you ...

Assignment hypothesis testing1 university of

Assignment: Hypothesis Testing 1. University of MarylandUniversityCollege is concerned that out of state students may be receiving lower grades than Maryland students. Two independent random samples have been selected: 1 ...

Data interpretation research reportyour task write a report

Data Interpretation Research Report Your task: Write a report on the statistical relationship that you find between the stock price of the company that you have been assigned and the following three variables: the FTSE, ...

Applied survival data analysis assignment1 show that for a

Applied Survival Data Analysis Assignment 1. Show that for a continuous F(t), h(t) = 1/θ, t > 0 is a constant (i.e., not dependent on t) if and only if T follows an exponential distribution (T ∼ EXP(θ)). 2. Show that if ...

Unit - data analysis projectall excel output should be

UNIT - DATA ANALYSIS PROJECT All Excel output should be copied into a single Word document where you must enter all of your responses to the questions below. Format the document professionally so it flows well. Include a ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro