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

Business analytics and statistics research report -this

Business Analytics and Statistics Research Report - This assignment is based on fictional data. You are creating a business report for the CEO of a retail company called, Athlete Panda. It must be professional in present ...

Assignment -a psychologist was interested in evaluating the

Assignment - A psychologist was interested in evaluating the effectiveness of a domestic violence prevention program in changing attitudes towards domestic violence in a sample of high school students. The psychologist r ...

Assessment - analytical reportobjectives - this assessment

Assessment - Analytical Report Objectives - This assessment addresses Unit Learning Outcomes: Discriminate the most appropriate descriptive and inferential statistics to use in a given health context, Analyse health data ...

Assessment task -you become interested in the non-skeletal

Assessment Task - You become interested in the non-skeletal effects of vitamin D and review the literature. On the basis of your reading you find that there is some evidence to suggest that vitamin D deficiency is linked ...

Part a -question 1 - true or false in data collection the

Part A - Question 1 - True or False: In data collection, the most common technique to ensure proper representation of the population is to use a random sample. True False Question 2 - Most analysts focus on the cost of H ...

Business statistics project -problem description the

BUSINESS STATISTICS PROJECT - Problem Description: The blockchain is a decentralized ledger of all transactions across a peer-to-peer network. Using this technology, participants can confirm transactions without a need f ...

Business data analysis computer assignment -part 1

Business Data Analysis Computer Assignment - PART 1 - Economists believe that high rates of unemployment are linked to decreased life satisfaction ratings. To investigate this relationship, a researcher plans to survey a ...

Assignment -for each of the prompts below report the

Assignment - For each of the prompts below, report the appropriate degrees of freedom, t statistic, p-value and plot using the statistical software platform of your choice (R/STATA) 1) A sample of 12 men and 14 women hav ...

Quantitative methods in health statistical analysis report

Quantitative Methods in Health Statistical Analysis Report - Question 1 - Are you a Lark or an Owl? Studies indicate that about 10% of us are morning people (Larks) while 20% are evening people (Owls) and the rest are no ...

Question - go to the website national quality forum nqf

Question - Go to the website, National Quality Forum (NQF), located in the Webliography, and download the article by WIRED FOR QUALITY: The Intersection of Health IT and Healthcare Quality, Number 8, MARCH 2008. You are ...

  • 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

Why might a bank avoid the use of interest rate swaps even

Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate

Describe the difference between zero coupon bonds and

Describe the difference between zero coupon bonds and coupon bonds. Under what conditions will a coupon bond sell at a p

Compute the present value of an annuity of 880 per year

Compute the present value of an annuity of $ 880 per year for 16 years, given a discount rate of 6 percent per annum. As

Compute the present value of an 1150 payment made in ten

Compute the present value of an $1,150 payment made in ten years when the discount rate is 12 percent. (Do not round int

Compute the present value of an annuity of 699 per year

Compute the present value of an annuity of $ 699 per year for 19 years, given a discount rate of 6 percent per annum. As