+61-413 786 465

info@mywordsolution.com

Statistics

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.

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:

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

ANALYSIS OF VARIANCE:

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

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 ...

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 ...

Applied statistics - regression assignmentin this

Applied Statistics - Regression Assignment In this assignment you are expected to set up a regression equation, run that regression and interpret and evaluate the results. You will need to carefully state all null hypoth ...

Linear project instructions -curve-fitting project - linear

Linear Project instructions - Curve-fitting Project - Linear Model For this assignment, collect data exhibiting a relatively linear trend, find the line of best fit plot the data and the line, interpret the slope, and us ...

The scientific method assessment task - data analysis

The Scientific Method Assessment Task - Data Analysis Assignment QUESTION 1 - Single-factor experiments Use Minitab for this question. The data in Q1 tab of 60902_AssessmentTask3Data_Spring2018.xlsx records blood cholest ...

Analysis - comparing group means background and objectives

Analysis - Comparing group means Background and objectives - The balance_FALL17.xlsx dataset represents data from a fictitious study that explores the impact of two different interventions designed to help elderly client ...

Assignment -in this assignment ms excel must be used to

Assignment - In this assignment MS Excel must be used to perform any calculations/graphical presentations as required in this assignment. Question 1 - Below you are given the examination scores of 20 students (data set a ...

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 ...

Applied Statistics Homework Project - Download the data twoGenes.sav from the Week Four content area of brightspace. Each row represents data from a different sample of yeast RNA expression. The data represent the log2 f ...

Business analytics and statistics research report

Business Analytics and Statistics Research Report Assignment - This assignment is based on fictional data - do not contact the company listed below. You are creating a business report for the CEO of a retail company call ...

• 13,132 Experts

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.

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