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

The attached excel file reports data on the length of stay

The attached excel file reports data on the length of stay (LOS) for patients at a hospital. Use Excel built-in formulae to answer each of the following questions: a. Plot a scatter diagram between two variables and brie ...

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 this exercise some of the estimation techniques

In this exercise, some of the estimation techniques presented in the module will be applied to the Springfield Shopping survey results. You may assume that these respondents represent a simple random sample of all potent ...

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, ...

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 ...

Consider an aumann model of incomplete information with

Consider an Aumann model of incomplete information with beliefs in which N = {I, II}, Y = {1, 2, 3, 4, 5, 6, 7, 8, 9}, F I = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}, F II = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9}} P(ω) = 1/9, ∀ ω ∈ Y ...

You have been instructed to complete a practice rstudio

You have been instructed to complete a practice RStudio assignment that installs all packages necessary to complete your RStudio assignments. Be sure to complete that assignment first before proceeding. 1. In week02, you ...

Qestion 1y1401208010013090110120130130100x53245445654a

Question 1. y 140 120 80 100 130 90 110 120 130 130 100 x 5 3 2 4 5 4 4 5 6 5 4 a. Develop a scatter plot for these data and describe what if any relationship exists. b. Compute the correlation coefficient. Test to deter ...

Inferential statisticscertified bmw requires appropriate

INFERENTIAL STATISTICS Certified BMW requires appropriate statistical analysis with a write up (memo) of approximately 3 pages. 1. a. Certified BMW thinks that the average price of all Model 330 cars is greater than $32, ...

Part a1 using the data in the appendices regarding cherokee

Part A 1. Using the data in the Appendices regarding Cherokee Hospitality Equipment & Supplies business, complete the following: a) List all personnel you would consult with in order to gain adequate advice prior to comm ...

  • 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

No more pencils inc disburses checks every two weeks that

No More Pencils, Inc., disburses checks every two weeks that average $94,000 and take five days to clear. How much inter

Drawing on the prescribed text andor relevant academic

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